P0698 Code - Sensor Reference Voltage 'C' Circuit Low
Quick Answer
When the diagnostic trouble code P0698 appears, it indicates that there is an issue with the sensor reference voltage 'C' circuit being too low. Common causes include Faulty wiring or connectors in the sensor reference voltage 'C' circuit, Malfunctioning sensor, Damaged ECM or PCM. 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
- P0698 indicates Sensor Reference Voltage 'C' Circuit Low.
- Common causes
- Common causes include Faulty wiring or connectors in the sensor reference voltage 'C' circuit, Malfunctioning sensor, Damaged ECM or PCM.
- 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 P0698 Description
When the diagnostic trouble code P0698 appears, it indicates that there is an issue with the sensor reference voltage 'C' circuit being too low. This sensor reference voltage is essential for the proper functioning of various sensors within the vehicle, as it provides the necessary power for them to operate effectively. The sensors rely on this voltage to send accurate data to the engine control module (ECM) or powertrain control module (PCM) to regulate various functions, such as fuel delivery, ignition timing, and emissions control.
Common Causes of P0698
- Faulty wiring or connectors in the sensor reference voltage 'C' circuit
- Malfunctioning sensor
- Damaged ECM or PCM
- Problem with the voltage regulator
Symptoms of P0698
- Engine performance issues
- Decreased fuel efficiency
- Rough idling or stalling
- Difficulty starting the engine
- Issues with acceleration or shifting gears
How to Fix P0698
- Begin by conducting a thorough inspection of the sensor reference voltage 'C' circuit, checking for any damaged wiring or connectors. Repair or replace any faulty components as needed.
- Test the sensor associated with the code to determine if it is functioning correctly. Replace the sensor if it is found to be malfunctioning.
- Inspect the ECM or PCM for any signs of damage or malfunction. Replace the module if necessary.
- Check the voltage regulator to ensure it is operating within the proper range. Replace the voltage regulator if it is not functioning correctly.
- Clear the diagnostic trouble codes from the vehicle's system and test drive the vehicle to confirm that the issue has been resolved.
Cost to Fix P0698
The cost of repairing a sensor reference voltage 'C' circuit low issue can vary depending on the specific cause of the problem and the extent of the repairs needed. Typically, the cost of parts for this repair can range from $100 to $300, while labor costs can range from $100 to $300 as well. However, as mentioned earlier, labor rates at auto repair shops can vary widely, so it's important to check with local shops for a more accurate estimate based on your specific vehicle make and model.
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Code P0698 Information for Specific Makes
- P0698 Buick — 5V Reference 3 Circuit Low Voltage
- P0698 Cadillac — 5V Reference 3 Circuit Low Voltage
- P0698 Chevrolet — 5V Reference 3 Circuit Low Voltage
- P0698 Chrysler — Accelerator Pedal Position Sensor Supply Voltage Too Low
- P0698 Dodge — Accelerator Pedal Position Sensor Supply Voltage Too Low
- P0698 GMC — 5V Reference 3 Circuit Low Voltage
- P0698 Hyundai — Sensor Reference Voltage 'C' Circuit Low
- P0698 Jeep — Accelerator Pedal Position Sensor Supply Voltage Too Low
- P0698 KIA — Sensor Reference Voltage 'C' Circuit Low
- P0698 Suzuki — 5 Volt Reference 3 Circuit Low Voltage
- P0698 Volkswagen — Sensor Reference Voltage 'C' Circuit Low
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