P0251 Code - Injection Pump Fuel Metering Control 'A' Malfunction
Quick Answer
The Fuel Control Actuator (FCA) is an electronically controlled solenoid valve. Common causes include Faulty Electronic Fuel Control Actuator, Electronic Fuel Control Actuator harness is open or shorted, Electronic Fuel Control Actuator circuit poor electrical connection. 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
- P0251 indicates Injection Pump Fuel Metering Control 'A' Malfunction.
- Common causes
- Common causes include Faulty Electronic Fuel Control Actuator, Electronic Fuel Control Actuator harness is open or shorted, Electronic Fuel Control Actuator circuit poor electrical connection.
- 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.
Code P0251 Description
The Diagnostic Trouble Code (DTC) will set when the ECM detects a discrepancy between the PWM supplied to the Electronic Fuel Control Actuator and the PWM returned from the Electronic Fuel Control Actuator.
What are the Possible Causes of the DTC P0251?
- Faulty Electronic Fuel Control Actuator
- Electronic Fuel Control Actuator harness is open or shorted
- Electronic Fuel Control Actuator circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0251?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0251 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P0251 Audi — Injection Pump Fuel Metering Control 'A' Malfunction
- P0251 Buick — Injection Pump Cam Sensor Circuit
- P0251 Cadillac — Injection Pump Cam Sensor Circuit
- P0251 Chevrolet — Injection Pump Cam Sensor Circuit
- P0251 Chrysler — Injection Pump Fuel Metering Control 'A' Malfunction
- P0251 Dodge — Common Rail High Pressure Pump Regulator Control
- P0251 GMC — Injection Pump Cam Sensor Circuit
- P0251 Jeep — Injection Pump Fuel Metering Control 'A' Malfunction
- P0251 Mercedes-Benz — Injection Pump Fuel Metering Control 'A' Malfunction
- P0251 Volkswagen — Injection Pump Fuel Metering Control 'A' Malfunction
Frequently Asked Questions about P0251 Code
1. What are the common symptoms of OBDII code P0251?
- Common symptoms include rough idling, engine misfires, loss of power, poor fuel efficiency, and the Check Engine light being illuminated.
2. What are the possible causes of OBDII code P0251?
- The code P0251 usually indicates a malfunction in the fuel metering control 'A' of the injection pump. Possible causes include a faulty fuel pump, wiring issues, a clogged fuel filter, or a problem with the fuel pressure regulator.
3. How serious is OBDII code P0251?
- OBDII code P0251 should be addressed promptly, as it can lead to poor engine performance and potential damage to engine components if left unresolved.
4. Can I still drive my vehicle with OBDII code P0251?
- It is not recommended to drive the vehicle with code P0251, as it may result in further damage to the fuel system and engine components.
5. How can I diagnose OBDII code P0251?
- Proper diagnosis involves using an OBDII scanner to retrieve the code, checking the fuel system components for any visible issues, and testing the fuel pump and related components for proper functionality.
6. What are some repair tips for fixing OBDII code P0251?
- Repair tips include checking and replacing the fuel filter, inspecting the fuel pump for proper operation, ensuring all wiring connections are secure, and testing the fuel pressure regulator.
7. How much does it cost to repair OBDII code P0251?
- The cost of repair for OBDII code P0251 can vary depending on the specific issue causing the code. It is recommended to get a diagnosis from a qualified mechanic to determine the exact cost.
8. Can OBDII code P0251 be triggered by a loose gas cap?
- No, OBDII code P0251 is related to a malfunction in the fuel metering control 'A' of the injection pump and is not caused by a loose gas cap.
9. Will disconnecting the battery reset OBDII code P0251?
- Disconnecting the battery may clear the code temporarily, but it will not fix the underlying issue causing OBDII code P0251. It is important to diagnose and repair the root cause of the problem.
10. Is it possible to prevent OBDII code P0251 from occurring?
- Regular maintenance of the fuel system, including changing the fuel filter as recommended, can help prevent issues that trigger OBDII code P0251.
Discuss the causes and fixes for P0251 OBDII Code
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