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 isn't getting the right signal from one of the sensors because the wire is broken or not connected properly.
The Engine Control Module (ECM) monitors the reference voltage sent to various sensors. If it detects an open circuit or no voltage in the 'C' circuit, it triggers this code.
P0697 indicates that the ECM has detected an open circuit or a lack of voltage in the reference voltage circuit 'C'. This circuit provides a stable voltage to sensors, and any interruption can cause sensor malfunctions.
• Check Engine Light is on
• Poor engine performance
• Fuel efficiency issues
• Possible sensor-related malfunctions
• Faulty sensor
• Open or shorted wiring in the circuit
• Poor electrical connection
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Check the voltage with a multimeter at the sensor connector.
• Test the sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty sensor.
• Ensure all connections are secure and free of corrosion.
• Replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wire repair tools
$100 - $500
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly inspect wiring and connectors for wear.
• Keep electrical components clean and dry.
• Perform regular vehicle maintenance.
Sensor Issue
• Avoid driving with the Check Engine Light on for extended periods.
• Have the vehicle checked by a professional if unsure about DIY repairs.
Check with the vehicle manufacturer for specific warranty coverage on sensors and wiring.
This code has been known to appear in vehicles with aging electrical systems or after repairs that disturb wiring.
Moderate – While the vehicle may still be drivable, performance issues could worsen.
Driving with a faulty sensor can lead to increased emissions and may not comply with local regulations.
• Engine running
• Sensors connected
The sensor is typically located on the engine, with wiring running to the ECM.
Q: Can I drive with a P0697 code?
A: It's possible, but not recommended as it may lead to further issues.
Q: How do I clear a P0697 code?
A: After repairs, use an OBD-II scanner to clear the code.
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