P0690 2018 Chevrolet Silverado Code - Electronic Control Module Power Relay Sense Circuit High
Quick Answer
The P0690 code on a 2018 Chevrolet Silverado indicates that there is an issue with the Electronic Control Module (ECM) power relay sense circuit, specifically that the voltage in the circuit is higher than normal. Common causes include Faulty Power Relay: The power relay itself may be malfunctioning, causing the high voltage in the circuit, Damaged Wiring or Connectors: Corrosion, fraying, or loose connections in the wiring or connectors can disrupt the circuit, Malfunctioning ECM: If the ECM is not functioning correctly, it may not be able to regulate the voltage in the circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0690 2018 Chevrolet Silverado indicates Electronic Control Module Power Relay Sense Circuit High.
- Common causes
- Common causes include Faulty Power Relay: The power relay itself may be malfunctioning, causing the high voltage in the circuit, Damaged Wiring or Connectors: Corrosion, fraying, or loose connections in the wiring or connectors can disrupt the circuit, Malfunctioning ECM: If the ECM is not functioning correctly, it may not be able to regulate the voltage in the circuit.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0690 2018 Chevrolet Silverado Description
The P0690 code on a 2018 Chevrolet Silverado indicates that there is an issue with the Electronic Control Module (ECM) power relay sense circuit, specifically that the voltage in the circuit is higher than normal. The ECM power relay is responsible for supplying power to the ECM, which controls various vital functions in the vehicle such as engine management, transmission shifting, and emissions control. When the voltage in the power relay sense circuit is too high, it can affect the ECM's ability to properly regulate these functions, leading to potential performance issues and even safety concerns.
Common Causes of P0690 2018 Chevrolet Silverado
- Faulty Power Relay: The power relay itself may be malfunctioning, causing the high voltage in the circuit.
- Damaged Wiring or Connectors: Corrosion, fraying, or loose connections in the wiring or connectors can disrupt the circuit.
- Malfunctioning ECM: If the ECM is not functioning correctly, it may not be able to regulate the voltage in the circuit.
- Other Electrical Issues: Problems with other components in the circuit, such as fuses or sensors, can also trigger this code.
- Overvoltage: External factors such as a voltage spike from a jump start or faulty battery can lead to high voltage in the circuit.
Symptoms of P0690 2018 Chevrolet Silverado
- Check Engine Light: The most common symptom of this code is the illumination of the check engine light on the dashboard.
- Engine Performance Issues: The vehicle may experience rough idling, misfiring, or hesitation during acceleration.
- Electrical Malfunctions: Other electrical components in the vehicle, such as the radio or power windows, may not function properly.
- Poor Fuel Efficiency: The vehicle may consume more fuel than usual due to the ECM not functioning optimally.
- Stalling: In severe cases, the vehicle may stall unexpectedly while driving.
How to Fix P0690 2018 Chevrolet Silverado
- Diagnostic Testing: Use a diagnostic scanner to confirm the P0690 code and pinpoint the exact cause of the issue.
- Inspect Power Relay: Check the power relay for any signs of damage or malfunction and replace if necessary.
- Check Wiring and Connectors: Inspect the wiring and connectors in the power relay sense circuit for any damage, corrosion, or loose connections, and repair or replace as needed.
- Test ECM: Verify that the ECM is functioning properly and replace if it is determined to be the cause of the high voltage.
- Clear Codes: Clear the code from the ECM's memory after completing the repairs and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0690 2018 Chevrolet Silverado
The cost of repairing a P0690 code on a 2018 Chevrolet Silverado can vary depending on the exact cause of the issue and the labor rates in your area. On average, the parts for this repair, such as a new power relay or ECM, can range from $50 to $200. Labor costs typically range from $100 to $300, with total repair costs falling between $150 and $500. Keep in mind that rates can fluctuate based on location, vehicle make and model, and the specific repair shop you choose. It's recommended to get quotes from multiple shops to find the best price for this repair.
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