P0689 Code - Electronic Control Module Power Relay Sense Circuit Low
Quick Answer
The diagnostic trouble code (DTC) P0689 indicates a problem with the electronic control module (ECM) power relay sense circuit being too low. Common causes include Faulty ECM power relay, Damaged power relay sense circuit, Corroded or loose electrical connections. 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
- P0689 indicates Electronic Control Module Power Relay Sense Circuit Low.
- Common causes
- Common causes include Faulty ECM power relay, Damaged power relay sense circuit, Corroded or loose electrical connections.
- 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 P0689 Description
The diagnostic trouble code (DTC) P0689 indicates a problem with the electronic control module (ECM) power relay sense circuit being too low. The ECM power relay is responsible for supplying power to the ECM, which is the brain of the vehicle's engine management system. When the power relay sense circuit is reading lower than expected, it can cause issues with the ECM's ability to function properly.
Common Causes of P0689
- Faulty ECM power relay
- Damaged power relay sense circuit
- Corroded or loose electrical connections
- Malfunctioning ECM
- Wiring issues or shorts in the circuit
Symptoms of P0689
- Engine misfires or hesitation during acceleration
- Check Engine Light illuminated on the dashboard
- Reduced fuel efficiency
- Difficulty starting the vehicle
- Stalling or rough idling
How to Fix P0689
- Begin by conducting a thorough inspection of the ECM power relay and power relay sense circuit 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 necessary.
- Inspect the power relay sense circuit for any damage or loose connections. Repair or replace any damaged components.
- Check the ECM for any signs of malfunction. If the ECM is found to be faulty, it may need to be replaced.
- Clear the diagnostic trouble codes from the vehicle's memory using a scan tool and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix P0689
The typical repair costs for addressing the P0689 code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair for this issue may range from $200 to $500, including parts and labor. It is essential to factor in additional costs for diagnostic time and any potential replacement parts that may be required. It is recommended to consult with a qualified mechanic or repair shop to obtain a more accurate estimate based on the vehicle's make and model.
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Code P0689 Information for Specific Makes
- P0689 Buick — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Cadillac — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Chevrolet — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Chrysler — Auto Shutdown Relay Control Circuit Low
- P0689 Dodge — Auto Shutdown Relay Control Circuit Low
- P0689 Ford — Electronic Control Module Power Relay Sense Circuit Low
- P0689 GMC — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Isuzu — Engine Controls Ignition Relay Feedback Circuit Low Voltage
- P0689 Jeep — Auto Shutdown Relay Control Circuit Low
- P0689 Lincoln — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Mazda — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Mercury — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Mitsubishi — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Pontiac — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Saturn — Electronic Control Module Power Relay Sense Circuit Low
- P0689 Suzuki — Engine Controls Ignition Relay Feedback Circuit Low Voltage
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