Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is getting too much power from a part that helps it turn on. It's like if a light bulb was getting too much electricity and might burn out.
The ECM/PCM power relay is responsible for supplying power to the vehicle's engine control module (ECM) or powertrain control module (PCM). When this code is triggered, it indicates that the voltage in the relay circuit is higher than expected.
The P0690 code is set when the ECM/PCM detects a voltage level in the power relay circuit that is higher than the specified range. This could be due to a short circuit, faulty relay, or wiring issues. The power relay is crucial for providing the necessary power to the ECM/PCM to control engine functions.
• Check Engine Light is on
• Engine may not start
• Intermittent starting issues
• Possible stalling
• Faulty ECM/PCM power relay
• Short circuit in the power relay circuit
• Faulty wiring or connectors
• ECM/PCM malfunction
ECM: Engine Control Module
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to verify the code.
• Inspect the ECM/PCM power relay for faults.
• Check for short circuits or damaged wiring.
• Test the voltage in the power relay circuit.
• Replace the faulty ECM/PCM power relay.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regular inspection of the vehicle's electrical system.
• Ensure all wiring is properly connected and insulated.
• Routine maintenance checks.
Electrical Circuit Issue
• Avoid driving the vehicle until the issue is diagnosed and repaired.
• Consult a professional mechanic if unsure about the repair process.
Check with your vehicle manufacturer; powertrain warranties may cover this issue.
P0690 is a less common code but can be critical if not addressed, as it affects the vehicle's power management system.
High – This issue can prevent the vehicle from starting or cause stalling, which can be dangerous.
Driving with this code may lead to unexpected stalling, posing a safety risk. Address the issue promptly.
• Engine off and ignition on
• Battery fully charged
The ECM/PCM power relay is typically located in the vehicle's fuse box, which is usually found under the hood or dashboard.
Q: Can I drive my car with a P0690 code?
A: It's not recommended, as the vehicle may stall or fail to start.
Q: How do I clear a P0690 code?
A: After repairs, use an OBD-II scanner to clear the code, then test drive to ensure it doesn't return.
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