Gm p1682-00

The video focuses on the basic Chervrolet specific diagnostic error code.Contents:0:21 Basic DTC analysis according to OBD2 protocol standard.1:48 Insight in...

Chevrolet Utility P1682 code . Car has been struggling to start for a while. A few days ago it wouldn't start. Towed it to local mechanic (live in a rural town). He replaced the coil pack. Car started. Shortly after engine light came on and had similar issue again (aswell as sometime starting but no acceleration). He ran a diagnostic and got a ...P1682 Ignition 1 Switch Circuit 2 Malfunction. Possible Causes. Powertrain relay has failed; If DTC P0685, P0689 or P0690 are set, repair the cause of these codes first! ECM connector is damaged (check pins for damage, and for moisture) Underhood electrical center or Junction block has failed; ECM has failedRead more at: P0685 ECM/PCM Power Relay Control Circuit Open. Potential causes for this code, P0686, to set are: A defective ignition switch. Faulty PCM power relay. A blown fusible link or fuse. Loose or corroded battery cable ends.Nearly 50,000 walked off the job in the biggest action by UAW workers in more than decade. The union is seeking higher pay and wants GM to keep more US plants open. Nearly 50,000 U...One of the codes that OBD-II can generate is P1682. This code specifically relates to the metering oil pump, which is a component of the engine oil system in a vehicle. The purpose of the metering oil pump is to provide a lubricating oil mist to certain parts of the engine, such as the bearings and pistons.OBD II fault code P1682 is a manufacturer-specific trouble code that is defined by carmaker General Motors as “Driver 5 Line 2” and is set when the PCM …

The first GM PassLock antitheft system was introduced in the mid-1990s. It prevents the car from starting with the wrong ignition key. Problems do occur with the PassLock system wh...2011 Chevy Silverado 1500 crew cab 5.3 6L80E 200K miles. Just swapped transmission out from 2013 Escalade 63K miles. Went to start truck and add more fluid to fill, and nothing. All lights and electrical work, no codes. With key in on position, no dash lights stay lit, except check engine. Turn key to run position and nothing, not event a click.Diagnostisera och åtgärda GM P1682: Tändning 1 brytarkrets 2 GM har utfärdat en servicebulletin #PIT4016F för att hantera en GM P1682 felkod och ingen vev, fördröjd vev, eller oönskad vev tillstånd på de fordon som anges nedan. Problemet visas som...P1682 Chevrolet Description. There are 2 ignition 1 voltage circuits supplied to the Engine Control Module (ECM). The first ignition circuit is provided by the powertrain relay, through a fuse. This ignition 1 voltage circuit supplies power to all the internal ECM circuits associated with the throttle actuator control (TAC) operation.The P1682 code is a generic powertrain code that indicates a problem with the ignition switch circuit in GMC vehicles. This code is specific to General Motors vehicles and is commonly found in GMC trucks, SUVs, and vans. The P1682 code points to a malfunction in the ignition switch circuit, which could lead to various issues such as starting ...U0073 Definition: Control Module Communication Bus”A” Off. U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Express as it would any other. This code appears when something has interrupted the communication between two of your Express’s control modules. The most common causes of U0073 are ...

Chevrolet TSB 19-NA-276. Some customers may comment that the engine stalled and/or a reduced engine power message was displayed. The technician may find DTCs P1682 and/or P0689 stored. This technical bulletin provides repair information to correct a customer concern of potential reduced engine power message displayed and/or engine stall with ...Re: check engine p1682. It sounds like the link that was posted by Spelos. Since you are mechanically inclined enough to use a code scanner, I would check the voltage before and after turning the ignition. If the voltage it low either the alternator isn't charging the battery or the battery is dead.GM is launching its own OnStar Insurance based on telematics and available to drivers of all brands of car. By clicking "TRY IT", I agree to receive newsletters and promotions from...When the Trailblazer SS stops running after being driven, Terry did a series testing and researching to find the fuse box is known for leaving many TBSS owne...Jan 30, 2020 ... P1682 Crank no start on 2009 Chevy Trailblazer ... TRAILBLAZER SS CODE P1682 FIXED. BLK_WILL_ SS•5.1K ... Chevrolet Silverado No Crank No Start FIX ...

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P1682 code. P1682 and yes i reset it. 2009 impala. I put in an new ignition switch. Not that i can think of - Answered by a verified Chevy Mechanic ... P1682 code and U0121-00 code on my 2014 camaro ss 6.2L Control Module ... 2010 Chevrolet Impala 3900 Motor. No start condition. All of the lights come on, ...Engine Codes. I had the engine codes read today at AutoZone, which were: U0101: Lost Communication with Transmission Control Module (TCM) P1682: Ignition 1 Switch Circuit 2. I had AutoZone reset the codes in case they were left over, but they came back on right away, with all remaining issues.GM stock is in the spotlight today as General Motors gets ready to unveil its Chevrolet Silverado E truck. Where is the automaker going next? Wedbush says the Silverado E is 'not y...Yes, truck has been sold. this is from the winter time Today we diagnose my Silverado with tons of electrical issues. ABS, AWD, any many other lights on the ...and/or P1682 Models Brand: Model: Model Years: VIN: Engine: Transmissions: from to Buick Enclave 2013 - 2014 All All All All Chevrolet Traverse 2013 - 2014 All All All All GMC Acadia 2013 - 2014 All All All All Involved Region or Country North America Condition Customer may comment of intermittent Service Engine Soon light on with ReducedIndices Commodities Currencies Stocks

P1682 P0138 P1391 . ... any code that starts with a P1 is a manufacturer specific code so the GM P1682 is diff from Chrysler. all P0 codes are universal. for dodge a P1682 means the charging system voltage is too low. since its the first code listed its the first one that needs to be fixed then move on to the rest of the codes if they come back ...Síntomas del código OBD2 P1682 GMC. Los síntomas de un código de avería P1682 GMC normalmente son: Se enciende la luz de fallo de motor (Check Engine) No hay arranque o encendido del motor; Fallo en el circuito de interruptor de encendido 1, circuito 2; Pérdida de potencia en el vehículo; Causas del código DTC P1682 GMCP1682 P0138 P1391 . ... any code that starts with a P1 is a manufacturer specific code so the GM P1682 is diff from Chrysler. all P0 codes are universal. for dodge a P1682 means the charging system voltage is too low. since its the first code listed its the first one that needs to be fixed then move on to the rest of the codes if they come back ...If the ECM detects a voltage difference between the 2 ignition 1 voltage circuits, DTC P1682 will set. P1682 Chevrolet Code - Ignition 1 Switch Circuit 2. How to Fix. Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or ...P1682 (00) is plausibility fault between +15 voltage and main relay. I'd check crimp joints J37, J45 and J42.Checked codes and P1682 comes up. ... Turns over, but no crank. First time this happened was when the engine was hot. Got in, turns over, but doesn't crank. Checked codes and P1682 comes up. ...GM is launching its own OnStar Insurance based on telematics and available to drivers of all brands of car. By clicking "TRY IT", I agree to receive newsletters and promotions from...Stabilitrack and Traction Control Off U0101, P1682. I have a 2013 Acadia with ~108k miles on it, which I've owned for a little over a year. A few days ago, I had several issues all pop up at the same time (listed below). As suggested in a couple of similar threads, I replaced the Brake Pedal Position Sensor and cleaned out the Throttle Body.CONDITION: Customers may comment of intermittent Service Engine Soon light on with Reduced Engine Power and/or engine stall with P0689 and/or P1682 stored in history. CAUSE: Terminal #51 at X3 Connector of Under Hood Fuse Block loose terminal tension with arcing corrosion on terminal #51 on fuse block. CORRECTION.

2007 GMC Truck Yukon Denali AWD. V8-6.2L. Vehicle. P0340. DTC P0340. Symptom Descriptor. Probable Causes Camshaft Position (CMP) SensorCamshaft Position (CMP) Sensor Reluctor WheelEngine Control Module (ECM)Engine Mechanical ConditionTiming Chain Tensioner. 2007 GMC Truck Yukon Denali AWD.

amigos , para colaborar con algun aporte para poder comprar comida balanceada para animales alias: scalzi.inyeccion por mercado pago toda ayuda es bienvenida...I'm getting codes p1682 and c0242-00. 2014 chevy traverse ls Common trouble codesP0171 code trouble Cadillac cts paint code locationCódigo c0242 (todas las marcas). My chevrolet is a suburban 1500 model 2001 with traction control (rpo2007 chevy cobalt reading the following codes p2444 2431 9411 0961 2430 2010 chevy malibu lt p0641 and c0242 ...Vehicle: 2016 GMC Savana 2500, V8-4.8L, Automatic Transmission/Transaxle Mileage: 242,385 Problem: The Savana was towed to the shop because the malfunction indicator light (MIL) was on, and the engine would crank over but not start. Case Details: The technician connected a scan tool and found these diagnostic trouble codes (DTCs): P0689 - Engine Controls Ignition Relay Feedback Circuit Low VoltageDec 8, 2021 · #OBDCodeP1682 #ignition1SwitchCircuit2P1682 Ignition 1 switch circuit 2 [SOLVED]This is very informative video on obd code P1682 on GM cars and trucks ... About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Categories Diagnostic Tips Tags 1500, 2014, 2015, Chevrolet, GMC, No Start, P1682, Sierra, Silverado Outside Rearview Mirror Charge Indicator LED Intermittent Operation During Charging – …About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Diagnosis a thrwsio GM P1682: Tanio 1 Switsh Circuit 2 Mae GM wedi cyhoeddi bwletin gwasanaeth #PIT4016F i fynd i'r afael â chod trafferth GM P1682 a dim crank, cranc wedi'i oedi, neu gyflwr cranc digroeso ar y cerbydau a restrir isod. Mae'r broble...Bad repairs caused this customer to buy an ECU when it wasn't the problem as you see here it was soldered on both sides then just crimped together with a con...One of the codes that OBD-II can generate is P1682. This code specifically relates to the metering oil pump, which is a component of the engine oil system in a vehicle. The purpose of the metering oil pump is to provide a lubricating oil mist to certain parts of the engine, such as the bearings and pistons.

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Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP. Connect one-on-one with {0} ... TSB buletin #PIT5546F: Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start / Unable to Program ECM / Headlamp Water Intrusion / Engine Runs with Ignition Off - (Sep 20, 2019)Subject: Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start ...2017 Colorado Z71 3.6L V6 4WD Extended Cab Summit White 2000 Pontiac TransAm WS6 5.7L V8 LS1 6 Speed Manual RWD Black Bed Lined Grille Bow Tie,White Bow Ties, WeatherTech (Floor Liners, Mud Flaps, Bump Step XL, Hood Protector, Side Window Deflectors & Sun Shade), BedRug, UltraFlex Tonneau Cover, Carhartt Seat Covers, Westin HDX XTREME Nerf Step Bars, Hitch Mount Reverse Lights, K & N (Air ...To diagnose the P1682 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.General Motors has taken a 25% stake in Seattle-based electric boating company Pure Watercraft. GM’s move reflects a broadening interest in all things EV, including boats and other...The P2534 code stands for “Ignition Switch Run/Start Position Circuit Low.”. It’s logged when the module detects a voltage below the manufacturer-specified value. A bad ignition switch, circuit problems, and faulty control modules are some of the issues that could trigger the trouble code. Some symptoms to keep an eye out for are an ...2007 GMC Truck Yukon Denali AWD. V8-6.2L. Vehicle. P0340. DTC P0340. Symptom Descriptor. Probable Causes Camshaft Position (CMP) SensorCamshaft Position (CMP) Sensor Reluctor WheelEngine Control Module (ECM)Engine Mechanical ConditionTiming Chain Tensioner. 2007 GMC Truck Yukon Denali AWD.OBD II fault code P1682 is a manufacturer-specific trouble code that is defined by carmaker General Motors as "Driver 5 Line 2" and is set when the PCM (Powertrain Control Module) detects a difference in voltage that exceeds a maximum allowable threshold between two circuits that supplies it with battery voltage. ... 2014 GMC Acadia, P1682 ...About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...2009 suburban getting a p1682 code (ign 1 switch circuit 2) causing a check light.... a suggestion was the ignition - Answered by a verified Chevy Mechanic ... Vehicle Type: Automobile/Light Trucks Year: 2007 Make: Chevrolet Truck Model: Suburban 1500 1/2 Ton Engine: 5.3 L 325 CID V8 codes in the ecm: P0455 (evap code), P1682 (ignition switch ...The reason I do not think it will work is because of the voltage P1682 code. But here is the way to perform the relearn. 1. Turn ignition on. 2. Attempt to start the engine, and then release the key to the "ON" position. 3. Observe the "SECURITY" indicator light. After 10 minutes the "SECURITY" indicator light will turn off.Went to remote-start the truck to go back to work, and no go. Started with key, and had a CEL. Again, P1682. After the last update, I had tested the battery, and it was somewhat weak, so I put in a new NAPA 84-month battery. So, apparently there is an intermittent issue here. ….

The fifth wire is the power relay sense circuit. It is used by the PCM to monitor power relay voltage. If the PCM detects a low voltage condition on the power relay sense circuit, a code P0689 will be stored and a malfunction indicator lamp (MIL) may be illuminated. A typical PCM powertrain control module, opened up:Jan 30, 2020 ... P1682 Crank no start on 2009 Chevy Trailblazer ... TRAILBLAZER SS CODE P1682 FIXED. BLK_WILL_ SS•5.1K ... Chevrolet Silverado No Crank No Start FIX ...Labor: 1.0. To diagnose the C0242 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.P069E code indicates that the FPCM has identified an issue in the fuel system and is requesting the PCM turn on the check engine light. The FPCM supplies and regulates the voltage that goes to the fuel pump and the fuel pump relay. It can be a stand-alone module or a computer integrated into the PCM. Usually, the FPCM is a stand alone module.A code P1682 can be accompanied by P0682 and that can cause the battery to lose charge and the dashboard lights are screwed up. A quiet, unassuming person, generally causing very little trouble, yet always questing onward! Excalibur! Like. pjones453 Discussion starter. 13 posts · Joined 2022.The antilock brake system (ABS) is controlled by its own computer. When it senses a problem, the ABS module on the dashboard will light up. When the problem is fixed, the module wi...The P1682 code is a diagnostic trouble code (DTC) that indicates a problem with the ignition switch circuit. This code is specific to General Motors (GM) vehicles and affects both gasoline and diesel engines. The code is stored when the powertrain control module (PCM) detects a malfunction in the ignition switch circuit, which can cause a ...EC Ignition Relay Feedback : 0,00 Volts OK, that is more than 3 Volts difference. Circuit/System Testing Ignition ON, observe the Ignition 1 Signal and the EC Ignition Relay Feedback scan tool parameter to determine which is less than B+. Ignition OFF, remove the relay that corresponds to the scan tool parameter that is less than B+.DTC P1400 should run and pass. Circuit/System Testing. • Inspect the air intake system for the following: - If any other DTCs are set, diagnose them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle . - Modified, damaged, or restricted. - Dirty or deteriorating air filter element. Gm p1682-00, Labor: 1.0. To diagnose the U0140 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., The only legit code I have is a P1682. The others I'm pretty sure are from driving in the reduced engine power mode. I have tested the power train and crank relays which from what I can tell control those circuits. ... 2013-2014 Chevrolet Traverse part # 22933347 - Accessory Wiring Junction Block. www.gmpartsdirect.com 2011 2LT FWD replaced by ..., P1682. Definition: Ignition 1 Switch Circuit 2. Description: P1682 The powertrain relay is commanded on. Ignition 1 Signal voltage is greater than 5.5 V. DTC P1682 runs continuously when the above conditions are met. Cause: The ECM detects that the voltage level difference is greater than 3 V between the 2 ignition voltage circuits for less ..., , Below are simple diagnostic steps when using a scan tool to monitor voltage. 1. Key On Engine Off (KOEO) check the ignition 1 and EC ignition relay voltage values on the scanner. 2. Check for any add on devices connected to the circuits. 3. Remove and inspect the PWR/TRN relay and the RUN/CRANK relay., 2010 Chevrolet Malibu 2.4 Engine Is Running Very Bad Code P1682-00. Check Details. Chevy malibu p0014: camshaft position b → over advanced → bank 1. Malibu p0113Resolved. 2011 malibu lt 2.4l: code p0507 2014 malibu 2.5 code p0013 vvt solenoid exhaust side fixLean code p0171 chevy malibu 06., Causas del código OBD2 P1682. Los motivos que provocan al almacenamiento del código de diagnóstico P1682 OBD2 son: Puede que el interruptor de encendido tenga daños. El circuito del swtich de encendido podría estar en corto. El relé de potencia podría estar defectuoso. El Módulo del control del motor pudiera tener deficiencias., Ignition - P1682. Jump to Latest Follow ... Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum. 1.3M posts 174.2K members Since 2004 A forum community dedicated to Chevy Trailblazer and GMC Envoy owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, towing capacity, maintenance, and more!, Quick overview of a chivy with a reduced engine power and P1516 code. More information here. https://www.backyardmechanic.org/causes-and-fixes-chevy-p1516-co..., Labor: 1.0. The cost to diagnose the U1510 Chevrolet code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour., 2014 Chevrolet Tahoe $7.37 $9.31 2014 Chevrolet Express $4.11 $5.37 2014 Chevrolet Impala Limited (W VIN) $4.44 N/A 2014 Chevrolet Silverado HD $5.86 $8.44 2014 Chevrolet Traverse $4.98 $7.09 2014 GMC Acadia $5.81 $5.85 2014 GMC Savanna $4.30 $5.56 2014 GMC Sierra HD $6.41 $8.77 2014 Yukon $7.59 $9.95 2014 Yukon XL $7.97 $10.00, If the ECM detects a voltage difference between the 2 ignition 1 voltage circuits, DTC P1682 will set. P1682 Chevrolet Code - Ignition 1 Switch Circuit 2. How to Fix. Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or ..., Ahorra tiempo y dinero: guiando los lectores a ahorrar tiempo y dinero, les proporcionamos información valiosa para reparar el circuito 2 del Interruptor de Encendido P1682 de GM de forma rápida y sencilla. Aquí encontrarás los pasos necesarios para realizar una reparación exitosa, además de algunos consejos útiles para evitar errores ..., Nov 17, 2022 ... I have ordered new plugs, coils and Ionization Module. Hope this solves the problem: Question: do old error messages have to be deleted in Tech2 ..., Reduced engine power light. P1516 P2101 In this video would be going over what the reduced engine power light means and what you should do to fix it, a few ..., What the P2534 code means. A P2534 trouble code is stored when the input reference voltage from the ignition switch run position circuit falls below the manufacturer's recommended minimum voltage. The code storage also causes the Check Engine light to illuminate in most circumstances, though some vehicles require multiple failure cycles …, The P1682 code is defined as "Driver 5 Line 2" in General Motors vehicles. Here is a guide about the meaning, causes and fix for this code. www.way.com. . Ray. '09 Avalanche LTZ - 5.3 - 4x4 - Black. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread., DTC P0689 stands for "ECM/PCM Power Relay Sensor Circuit Low," and this is logged when the PCM detects low voltage in the power relay sense circuit. Code P0689 is often caused by a malfunctioning PCM relay, circuit issues, and a blown fuse. The most common symptoms of code P0689 include driving issues, malfunctioning electric accessories ..., Code P1682 sets if the ECM detects a difference in the voltage levels of the two main power inputs to the ECM. Basically, the code will be stored when one voltage input has a significantly different value than the other one. Often a wiring faults, including corrosion on terminals, is at least a part cause. Other possibilities are a fault with ..., The will be set when the ECM detects greater than 3.5 V on the generator control circuit for 5 s with the ignition ON and engine OFF, or the ECM detects a low or high voltage for 15 s on the generator control circuit with the engine running. P0621 Chevrolet Code - Generator Lamp L Control Circuit Malfunction., P1682, P0689 and P0443 were set along with some thr... my 06 envoy died while driving, restarted and went another 50 feet and died again, with crank, no start. P1682, P0689 and P0443 were set ..., Categories Diagnostic Tips Tags 1500, 2014, 2015, Chevrolet, GMC, No Start, P1682, Sierra, Silverado Outside Rearview Mirror Charge Indicator LED Intermittent Operation During Charging - 2014-2016 Cadillac ELR, M. Ma v e n. 2200 posts · Joined 2018. #6 · Jan 11, 2019. P1682 is the ECM ignition power relay fault. It's from the ECM sensing two different battery voltages. It can be caused by a bad battery cable, but it's usually the relay or the fuse block. Diagnosis is preferred to parts replacement, but swapping the KR75 Engine control relay with ..., General Motors has taken a 25% stake in Seattle-based electric boating company Pure Watercraft. GM’s move reflects a broadening interest in all things EV, including boats and other..., P1682=Charging System Voltage Too Low. Possibly the Alternator is failing, have the output checked. Like. B. brianl703. 1488 posts · Joined 2006. #3 · May 9, 2008 (Edited) This is described as a "Plausibility fault between voltage feed from +15 and main relay". Basically one voltage was present when another one was not., $0.00 + Sold in packs of 1 x 1: $99.79: Alternate: Quantity: Add to Cart. ULTRA-POWER E3765M Info . ... GM GENUINE M10177 Includes Non-Serviceable Lifetime Filter; w/o Fuel Level Sensor - Must Transfer From Old Unit Info . Flex Fuel. GM GENUINE M10177. $210.99: $0.00 + Sold in packs of 1 x 1:, Saludos. Código P1682: Circuito 2 del interruptor de encendido 1. ECM ha detectado una diferencia de tensión entre dos circuitos. Se suministran 2 circuitos de encendido y 1 voltaje al módulo de control del motor (ECM). El primer circuito de encendido lo proporciona el relé del tren motriz a través de un fusible., Help!!!!! My 14 cruze 1.4L has codes p0335 p0336 & p1682. Crank sensor performance & crank sensor ckt codes. (No throttle response rough idle stalls out & reduced power mode) Also a voltage code for ignition switch. I put a new cranksensor & connector on it & neg. Battery cable but no luck! Crazy thing is with the crank sensor out of the block ..., I explained how to troubleshoot code p1682 Turns out the problem being the fuse box on my case...hope it helps!, The P2534 code is related to the ignition system of the vehicle. It indicates that the Body Control Module (BCM) is unable to control the ignition main relay due to low voltage. The control module detects 6 volts or less on the ignition voltage circuit when the ignition is turned ON, triggering the Diagnostic Trouble Code (DTC)., Indices Commodities Currencies Stocks, P0689 is a diagnostic trouble code (DTC) for "ECM/PCM Power Relay Sense Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 ., If the ECM detects a voltage difference between the 2 ignition 1 voltage circuits, DTC P1682 will set. P1682 2014 GMC Sierra Code - Ignition 1 Switch Circuit 2. How to Fix. Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or ...