P0687 2015 Chevrolet Silverado Code - Engine Control Module Power Relay Control Circuit High
Quick Answer
The powertrain relay is a normally open relay. Common causes include Weak battery, Low voltage while cranking, Faulty Engine Control Module (ECM) power relay. 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 Weak battery, Low voltage while cranking, Faulty Engine Control Module (ECM) power relay.
- 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.
Code P0687 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0687 2015 Chevrolet Silverado?
- Weak battery
- Low voltage while cranking
- Faulty Engine Control Module (ECM) power relay
- ECM power relay harness is open or shorted
- ECM power relay circuit poor electrical connection
- Blown ECM fuse
- Faulty ECM
How to Fix the DTC P0687 2015 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0687 2015 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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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