What Does the P0698 Code Mean?
OBD-II Code P0698 is defined as a Sensor Reference Voltage “C” Circuit Low. This code indicates that the engine control module (PCM) has detected an issue with the 5-volt reference signal sent to various engine sensors.
What Causes the P0698 Code?
The P0698 code is triggered when the PCM identifies a problem with the reference voltage signal. Potential causes include:
- Engine sensor failure
- Powertrain Control Module (PCM) failure
- Wiring issues related to the sensor reference circuit
What Are the Symptoms of the P0698 Code?
Symptoms associated with the P0698 code may include:
- Engine may not start
Note that the same symptom may also be caused by other issues.
How Serious Is the P0698 Code?
This code has a moderate severity level. While it may not pose an immediate threat to the vehicle’s safety or functionality, it is advisable to have it diagnosed within a reasonable timeframe to prevent further complications.
How to Diagnose the P0698 Code
To properly diagnose the P0698 code, a mechanic will typically:
- Use an OBD-II scanner to verify the code and check for any related codes.
- Inspect the wiring and connectors related to the sensor reference voltage circuit.
- Test the output voltage from the PCM and the affected sensors.
- Check for any signs of shorts or opens in the circuit.
Common Repairs for the P0698 Code
Repairs for the P0698 code may include:
- Replacing faulty engine sensors
- Repairing wiring issues
- Replacing or reprogramming the Powertrain Control Module (PCM)
How Much Does It Cost to Fix the P0698 Code?
The cost of fixing the P0698 code can vary widely based on the underlying issue:
- Sensor replacement can range from $100 to $300.
- Wiring repairs may cost between $50 and $150.
- PCM replacement or reprogramming may go from $200 to $1,000 depending on the vehicle.
Can I Fix the P0698 Code Myself?
If you have experience with automotive repairs, you may be able to diagnose and fix minor wiring issues or replace a faulty sensor yourself. However, for PCM-related problems or if you’re unsure, it’s recommended to consult a professional mechanic.
