Fuel Volume Regulator Control Circuit High
This code indicates that a high voltage reading has been detected in the fuel volume control circuitry.
Code Set Parameters
Voltage variations that exceed battery voltage by at least 10-percent will trigger the code and illuminate the service engine soon lamp.
A code is stored and the service engine lamp is illuminated.
Inspect wiring and electrical connectors for damage from wildlife, broken or shorted wiring, or loose/corroded electrical connectors. Other less likely causes include a faulty volume regulator or PCM.
Replacement of the electronic volume regulator control and/or the PCM often prove futile. This code is often detected in error when using less sophisticated code readers and should be rechecked using an alternative scanner or code reader. If no second code reading device is available, the code should be cleared and the vehicle operated to see if it resets.
- Begin your diagnosis by visually inspecting all wiring and connectors
- Look for shorted or burned wiring and replace circuitry and connectors as required
If the system wiring, connectors, and components appear to be in normal working order, connect the scanner to the diagnostic connector and record all stored trouble codes and freeze frame data
- This information can be extremely helpful in diagnosing intermittent conditions that may have contributed to this code being stored
- After the codes are cleared, operate the vehicle to see if the code returns
- If the code fails to immediately return, you may have an intermittent condition
- Intermittent conditions can prove to be quite a challenge to diagnose and in extreme cases may have to be allowed to worsen before a correct diagnosis can be made.
Voltage and ground circuits may be tested using a voltage drop method, with emphasis on locating a discrepancy of greater than 10-percent of battery voltage
- Sensor voltage must be tested according to vehicle make and model specifications (typically around 5-volts)
- The fuel volume control regulator may be tested by checking resistance after it has been unplugged from the PCM harness
- Replace the PCM only as a last resort, after verifying that the code truly exists and after exhausting all other possibilities.