P0686 2017 Chevrolet Silverado Code - Engine Control Module Power Relay Control Circuit Low
Quick Answer
The P0686 code for a 2017 Chevrolet Silverado indicates a problem with the Engine Control Module (ECM) Power Relay Control Circuit being low. Common causes include Faulty ECM power relay, Damaged wiring or connectors in the power relay control circuit, Blown fuse related to the 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
- P0686 2017 Chevrolet Silverado indicates Engine Control Module Power Relay Control Circuit Low.
- Common causes
- Common causes include Faulty ECM power relay, Damaged wiring or connectors in the power relay control circuit, Blown fuse related to the 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.
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Code P0686 2017 Chevrolet Silverado Description
The P0686 code for a 2017 Chevrolet Silverado indicates a problem with the Engine Control Module (ECM) Power Relay Control Circuit being low. The ECM power relay is responsible for providing power to the ECM, which is a crucial component in controlling the engine's operation. When the power relay control circuit is detected to be low, it means that there is a malfunction in the circuit that is supplying power to the ECM. This can lead to a variety of issues with the engine's performance and overall vehicle operation.
Common Causes of P0686 2017 Chevrolet Silverado
- Faulty ECM power relay
- Damaged wiring or connectors in the power relay control circuit
- Blown fuse related to the ECM power relay
- Malfunctioning ECM
- Corrosion or poor connections in the power relay control circuit
Symptoms of P0686 2017 Chevrolet Silverado
- Engine misfires or rough idling
- Decreased fuel efficiency
- Difficulty starting the vehicle
- Stalling or hesitation during acceleration
- Illumination of the Check Engine Light
How to Fix P0686 2017 Chevrolet Silverado
- Begin by conducting a thorough inspection of the ECM power relay, wiring, and connectors to identify any visible damage or corrosion.
- Test the ECM power relay using a multimeter to determine if it is functioning correctly.
- Check the fuses related to the ECM power relay and replace any that are blown.
- If the ECM power relay is found to be faulty, replace it with a new, OEM part.
- Clear the diagnostic trouble codes from the vehicle's ECM and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0686 2017 Chevrolet Silverado
The typical repair costs for addressing a P0686 code on a 2017 Chevrolet Silverado can range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.
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Frequently Asked Questions about P0686 2017 Chevrolet Silverado Code
1. What does the OBDII code P0686 mean for a 2017 Chevrolet Silverado?
P0686 indicates a problem with the Engine Control Module (ECM) Power Relay Control Circuit, specifically that the circuit voltage is too low.
2. What are the common symptoms of code P0686 in a 2017 Chevrolet Silverado?
Typical symptoms include difficulty starting the engine, engine stalling, reduced performance, or a no-start condition.
3. What causes the P0686 code to appear in a 2017 Chevrolet Silverado?
Common causes include a faulty ECM power relay, damaged wiring or connectors in the power relay circuit, or a malfunctioning ECM.
4. Can a weak battery trigger the P0686 code in my Silverado?
Yes, a weak or failing battery can cause insufficient voltage to the ECM power relay, potentially triggering the P0686 code.
5. Is it safe to drive my 2017 Silverado with the P0686 code active?
It is not recommended to drive with this code active, as it may lead to stalling or difficulty restarting, which can create unsafe driving conditions.
6. How do I diagnose the P0686 code on my Silverado?
Begin by checking the ECM power relay for proper operation, inspecting related wiring and connectors for damage, and testing the battery voltage to ensure it’s within a normal range.
7. How can I fix the P0686 code on a 2017 Chevrolet Silverado?
Repairs may involve replacing a faulty ECM power relay, repairing or replacing damaged wires or connectors, and in some cases, replacing the ECM itself.
8. Can a blown fuse cause the P0686 code in my Silverado?
Yes, a blown fuse in the ECM power circuit can interrupt the power supply and trigger the P0686 code.
9. What tools do I need to troubleshoot the P0686 code?
You’ll need an OBDII scanner, a multimeter for testing voltage and continuity, and possibly wiring diagrams for the ECM power circuit.
10. How much does it typically cost to fix the P0686 code on a 2017 Silverado?
Repair costs can vary, but replacing a faulty ECM power relay typically costs $50–$150, while more extensive wiring repairs or ECM replacement can exceed $500.
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