What is the P0002 code?
The P0002 diagnostic code is a generic powertrain code (OBD-II). It applies to many vehicles (Ford, Dodge, Vauxhall/Opel, Volkswagen, Mazda, etc.). Although generic, specific repair steps may vary by make and model.
Symptoms of the P0002 code
This fault, which is not very common, often manifests as:
- Illuminated check engine light
- Loss of power or hesitation during acceleration
- Abnormally high fuel consumption
- Difficulty starting
- The vehicle may enter limp mode
What are the likely causes of the P0002 fault?
The P0002 code indicates a problem with the Fuel Volume Regulator Control Circuit Range/Performance. It is frequently observed on common rail diesel engines and direct injection gasoline engines (GDI).
High-pressure fuel systems include a high-pressure fuel pump. Its role is to increase fuel pressure to deliver it to the common rail and injectors. This pump has a fuel volume regulator that controls the pressure. The P0002 code signals that the engine control module (ECU) has detected an electrical value (voltage, resistance, or control signal) outside the normal operating range for this regulator.
Main causes:
- Faulty fuel volume regulator: The component itself is defective.
- Wiring problem: Damaged, loose, corroded, or shorted cables related to the regulator.
- Faulty connector: Poor contact at the regulator plug.
- Failing high-pressure fuel pump: An internal mechanical issue can skew measurements.
- Problem with the engine control module (ECU): A rare but possible internal failure.
Diagnosis and repair of the P0002 code
Warning: Handling high-pressure fuel circuits is dangerous. It is strongly recommended to have the diagnosis performed by a qualified mechanic.
The diagnostic process generally includes:
- Using an OBD-II scanner to confirm the code and check live data.
- Complete visual inspection of the wiring and connectors associated with the regulator for damage.
- Electrical measurements (multimeter) to check the regulator’s supply voltage, ground, and control signal.
- Measuring the regulator’s resistance and comparing it with manufacturer specifications.
- High-pressure fuel pump performance tests.
Conclusion and call to action
The P0002 code points to an electrical malfunction in the fuel volume regulator control circuit. Ignoring this fault can lead to performance loss, excessive fuel consumption, or more severe damage to the injection system.
Is your vehicle displaying the P0002 code? Don’t take risks. Have your vehicle diagnosed by a professional to identify the exact cause and proceed with the appropriate repair to get a personalized quote and get your vehicle back in working order.