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How to fix car code P1682?

The car code P1682 indicates an issue with the engine control module (ECM) or the wiring related to it. This code is typically triggered when the ECM detects a problem with the power supply or ground circuit. To fix this issue, you'll need to diagnose the underlying cause and make the necessary repairs.


Diagnosing the Problem


To diagnose the P1682 code, you'll need to use an OBD-II scanner to retrieve the specific trouble code and any additional information it provides. This can help you identify the root cause of the problem. Some common causes of the P1682 code include:



  • Faulty ECM power supply or ground circuit

  • Wiring issues, such as a short circuit or open circuit, in the ECM power or ground circuits

  • Malfunctioning ECM


Once you've identified the underlying cause, you can proceed with the necessary repairs.


Fixing the P1682 Code


The steps to fix the P1682 code will depend on the specific cause of the problem. Here are some general steps you can take:



  1. Check the ECM power supply and ground circuits for any wiring issues, such as loose connections, shorts, or open circuits. Use a multimeter to test the voltage and continuity of these circuits.

  2. If the wiring appears to be in good condition, the ECM itself may be faulty and need to be replaced.

  3. If the ECM is not the issue, you may need to check for any other electrical problems in the vehicle that could be affecting the ECM's power supply or ground.

  4. Once the problem has been identified and repaired, clear the P1682 code using the OBD-II scanner and test the vehicle to ensure the issue has been resolved.


Fixing the P1682 code may require some electrical troubleshooting and potentially the replacement of the ECM or other related components. If you're not comfortable performing these repairs yourself, it's best to have a professional mechanic diagnose and fix the issue.

What tools do I need to change an ignition switch?


Tools and Materials Needed for the Job

  1. Socket and ratchet set.
  2. Screwdrivers (Phillips and flathead)
  3. Wire stripper.
  4. Wire connectors.
  5. Crimping tool.
  6. Electrical tape.
  7. Ignition switch replacement kit specific to your vehicle model.
  8. Safety gloves.



Can you drive with a P1682 code?


Because the P1682 code can indicate that there's a problem with your ignition switch or overall engine, this can be a very dangerous engine code, especially if left alone for long enough.



Can you drive with a low voltage o2 sensor?


If your vehicle has a P0131 code caused by a malfunctioning oxygen sensor, it's best to stop driving it until you replace the faulty part. You want to avoid aggravating the issue that triggered the P0131 code in the first place.



How to fix a bad ignition switch?


Step-by-Step Guide to Ignition Switch Replacement

  1. Step 1: Remove the failed ignition switch. Remove the trim to access the switch, whether it's mounted on the steering column or the dash.
  2. Step 2: Install the new part.
  3. Step 3: Test its operation.
  4. Step 4: Final checks.



Where is the ignition switch located?


Located on the steering wheel on the column or dash area, the switch is the key to getting your car to start. The key is inserted to let you turn the switch from off to on, accessory, and start.



How to start a car with a bad ignition switch?


In emergencies, you can safely bypass the faulty ignition switch to start your car. This involves using a relay or jumper wire to connect the starter directly to the battery. While this is a temporary solution, it requires caution and should only be done in emergency situations.



What causes the P1682 code?


Code P1682 is often caused by a malfunctioning ignition switch, a bad electrical connection, and an open or shorted ignition switch harness. The most common symptoms of code P1682 include a lit check engine light, a weak or dead battery, or an engine that struggles to start.



What is the code P1682 on a Chevy driver 5 line 2?


This code is telling us that the computer is not seeing battery voltage where it expects to see it. Check underhood fuse block, fuse #19 and fuse #78. Use a test light and see if there is power present at those two fuses.



What is the code P1682 on a Pontiac G6?


P1682 is a diagnostic trouble code that indicates that your Pontiac G6's ignition switch is having a voltage problem. It is typically caused by a faulty ignition switch, although there can be other causes as well. There are two “circuits” to the ignition switch.



What is the code for the ignition coil sensor?


If your vehicle's computer detects a problem in the ignition coil circuit, it may send the ignition coil circuit codes P0351-P0358. The last digit of these codes refers to the cylinder where the issue is located. Repair and diagnosis procedures might differ according to the cylinder.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.