P0687 2015 Chevrolet Silverado Code - Engine Control Module Power Relay Control Circuit High
Quick Answer
The P0687 diagnostic trouble code (DTC) in a 2015 Chevrolet Silverado indicates that there is a problem with the Engine Control Module (ECM) power relay control circuit. Common causes include Faulty ECM power relay, Wiring issues in the power relay circuit, Blown fuse related to the ECM. 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
- P0687 2015 Chevrolet Silverado indicates Engine Control Module Power Relay Control Circuit High.
- Common causes
- Common causes include Faulty ECM power relay, Wiring issues in the power relay circuit, Blown fuse related to the ECM.
- 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 P0687 2015 Chevrolet Silverado Description
The P0687 diagnostic trouble code (DTC) in a 2015 Chevrolet Silverado indicates that there is a problem with the Engine Control Module (ECM) power relay control circuit. The ECM power relay is responsible for supplying power to the ECM, which controls various engine functions such as fuel injection, ignition timing, and emissions systems. When the power relay control circuit is reading high, it means that there is an issue with the voltage being supplied to the ECM.
Common Causes of P0687 2015 Chevrolet Silverado
- Faulty ECM power relay
- Wiring issues in the power relay circuit
- Blown fuse related to the ECM
- ECM malfunction
- Corrosion or poor connections in the power relay circuit
Symptoms of P0687 2015 Chevrolet Silverado
- Engine stalling or rough idling
- Reduced engine power
- Illuminated check engine light
- Poor fuel efficiency
- Difficulty starting the vehicle
How to Fix P0687 2015 Chevrolet Silverado
- Begin by performing a thorough inspection of the ECM power relay and related wiring to check for any visible damage or corrosion.
- Test the power relay using a multimeter to ensure it is functioning correctly. Replace the relay if it is found to be faulty.
- Check the fuses related to the ECM and replace any blown fuses.
- Inspect the ECM for any signs of damage or malfunction. If necessary, replace the ECM.
- Clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0687 2015 Chevrolet Silverado
The cost of repairing a P0687 DTC in a 2015 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the cost of replacing an ECM power relay can range from $50 to $150, while the cost of replacing the ECM itself can be significantly higher, ranging from $500 to $1000. Labor costs for diagnosing and repairing this issue can range from $100 to $300, depending on the shop's hourly rate and the complexity of the repair. It is advisable to consult with a trusted mechanic or dealership to get a more accurate estimate based on the specific circumstances of the vehicle.
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Frequently Asked Questions about P0687 2015 Chevrolet Silverado Code
1. What does the OBDII code P0687 mean on a 2015 Chevrolet Silverado?
P0687 indicates an issue with the Engine Control Module (ECM) Power Relay Control Circuit, specifically that it is operating at a high voltage, which can disrupt the ECM's ability to control engine performance.
2. What are the common symptoms of code P0687 in a 2015 Chevrolet Silverado?
Symptoms may include failure to start, intermittent stalling, loss of power, or the Check Engine Light illuminating.
3. What causes the P0687 code to appear on my Silverado?
Common causes include a faulty ECM power relay, damaged wiring, loose or corroded electrical connections, or, in rare cases, a malfunctioning ECM.
4. Can a bad battery cause the P0687 code in a 2015 Silverado?
Yes, a weak or failing battery can cause voltage irregularities that might trigger this code.
5. How do I diagnose the P0687 code on my 2015 Chevrolet Silverado?
Start by checking the ECM power relay, inspecting wiring and connections for damage or corrosion, and testing voltage levels to ensure proper power delivery.
6. Can a faulty ECM cause the P0687 code in my Silverado?
While less common, a malfunctioning ECM can cause this code if the power relay control circuit inside the ECM is compromised.
7. How do I fix the P0687 code on a 2015 Chevrolet Silverado?
Repairs may include replacing the ECM power relay, repairing damaged wiring, cleaning corroded connectors, or replacing the ECM if it is found to be faulty.
8. Is it safe to drive my 2015 Silverado with the P0687 code?
Driving with this code is not recommended, as it can lead to engine stalling, which may cause unsafe driving conditions.
9. How much does it cost to repair the P0687 code on a 2015 Chevrolet Silverado?
Repair costs can vary, with relay replacements typically costing $50-$150, while ECM replacement may cost $500-$1,500 depending on labor and parts.
10. Can clearing the code fix the P0687 issue in my Silverado?
Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue must be addressed to prevent the code from returning.
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