P0257 OBD-II Trouble Code: Injection Pump Fuel Metering Control "B" Range/Performance (Cam/Rotor/Injector)

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0257 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0257 code

P0257 is a diagnostic trouble code (DTC) for "Injection Pump Fuel Metering Control "B" Range/Performance (Cam/Rotor/Injector)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0257 DIAGNOSTIC Get a fair and transparent estimate upfront

P0257 code definition

The P0257 code indicates injection pump fuel metering control “B” range/performance (cam/rotor/injector).

What the P0257 code means

The P0257 code means that the powertrain control module has found a discrepancy in the signal voltage that goes from the electronic fuel control actuator and the return signal from the fuel metering control sensor. This code only applies to vehicles that are running on diesel. If it does show up in another vehicle, it means that there is a problem with the powertrain control module.

What causes the P0257 code?

Here are some of the most common causes for the P0257 code.

  • Dirty fuel filter
  • Clogged fuel filter
  • Open or shorted circuits
  • Open or shorted electrical connectors
  • Defective fuel pump
  • Faulty fuel control actuator driver in the powertrain control module

What are the symptoms of the P0257 code?

In many cases, the symptoms associated with the P0257 code are very minor. They result in a stored code, and the Check Engine Light will likely come on in the vehicle. Other times, the vehicle might not start at all, or it will be difficult to start if you are fortunate enough to get it going. You might also notice that there is more smoke coming from the exhaust system than is normal. The engine might also suffer from misfires, and it might have some hesitation or chugging when trying to accelerate.

How does a mechanic diagnose the P0257 code?

Mechanics will make use of a tool called an OBD-II scanner. This scanner connects to the computer that is on the vehicle. The car’s onboard computer can store these codes and other data about the vehicle. The scanner provides that valuable information to the mechanic. It will make it much easier to determine the actual problem with the vehicle. The mechanic will also want to reset the code to see if it comes back when they test drive the vehicle.

Common mistakes when diagnosing the P0257 code

As with similar codes, the common mistakes made during the diagnosis is believing that the injectors or the injector pump is the problem. Most of the time, the cause will be the fuel filter.

How serious is the P0257 code?

You never want to be driving around with your Check Engine Light on and codes stored in your vehicle. Even if you do not notice any issues with your vehicle’s performance with a P0257 code, that doesn’t mean there isn’t a problem. Many people do suffer from performance issues. The vehicle starts hard or it doesn’t start at all. The vehicle might run rougher than usual as well. Anything that alters the performance of your vehicle can be dangerous, and it is better to take care of it sooner rather than later.

What repairs can fix the P0257 code?

The following are some of the repairs mechanics might make to your vehicle to fix the P0257 code.

  • Check the vehicle with the OBD-II device.
  • Reset the code and test the vehicle. Check to see if the P0257 code comes back.
  • Check the electrical connections for corrosion and other issues. Repair or replace any parts as needed.
  • Replace the fuel filter
  • Replace the fuel pump
  • Replace the fuel control actuator driver in the powertrain control module.

Additional comments for consideration regarding the P0257 code

When vehicles get older, it is true that the warning lights and codes could be activated by mistake. This is especially true when a vehicle has more than 100,000 miles on it. However, that doesn’t mean you should ever ignore these types of issues. You will want to make sure that you take the vehicle to a mechanic who can diagnose the P0257 issue and repair it properly. This ensures better performance for your vehicle, not to mention peace of mind for you.

Need help with a P0257 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.

trouble codes
P0257
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0257 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

4,810

Rating Summary
4,424
187
47
28
124
4,424
187
47
28
124

Joel

19 years of experience
741 reviews
Joel
19 years of experience
Acura RL - Check Engine Light is on - Jacksonville, Florida
very knowledgeable and precise. able to fix electrical issues in my car. Right on time for the appointment.

Christopher

15 years of experience
41 reviews
Christopher
15 years of experience
Honda Accord - Check Engine Light is on - Fairburn, Georgia
Christopher was excellent! He explained everything in detail to make sure I understood. He was professional and provided me with the next course of actions to resolve my care issues. I'm glad he was sent to service my car.

Alexander

18 years of experience
58 reviews
Alexander
18 years of experience
Saab 9-7x - Check Engine Light is on - Kissimmee, Florida
He was very friendly and very helpful . I felt like it was being around a close friend , also gave me so very good advice on my car & future advice about it . Highly recommend mechanic, would use his services again .

Matthew

31 years of experience
639 reviews
Matthew
31 years of experience
Jeep Patriot - Check Engine Light is on - Norfolk, Virginia
Matthew was on time which was a relief, he is very knowledgeable and was easy to understand what was wrong and what was being done. I am recommending to friends and family due to the great experience Matthew gave me. Extremely professional 10/10

More related articles

P2184 OBD-II Trouble Code: Engine Coolant Temperature Sensor 2 Circuit Low
P2184 P2184 code definition P2184 is an OBD-II generic code for the engine control module (ECM) detecting the engine coolant temperature sensor (ECT) #2 is indicating low range and does not correlate with ECT sensor #1. What causes the...
P0705 OBD-II Trouble Code: Transmission Range Sensor Circuit Malfunction (PRNDL Input)
P0705 code definition Transmission Range Sensor Circuit Malfunction (PRNDL Input) What the P0705 code means Diagnostic trouble code P0705 indicates that the...
B1970 OBD-II Trouble Code: Passenger Seatback Forward Switch Circuit Short to Ground
B1970 means there is an issue with the passenger seatback forward switch, likely due to a faulty switch or damaged electrical components.

Related questions

My Check Engine Light came on and the code read intake valve is stuck open

Hi there: Anytime you have an error code created, it is stored inside the ECU and triggers the check engine light. The only way to solve the issue is to have a professional mechanic to complete a check engine light...

Unresolved leakage problems

Have the oil pressure tested to see if it is low, or the oil sensor is reading wrong. Also have the engine compression tested to see if the cylinder number 2 has a problem or not. The P0302 code...

Would the throttle positioning sensor cause the engine to rev up while driving?

Your issues may stem from a variety of components. Have the vehicle scanned for diagnostic troubleshooting codes. This will give you more information on any issues the computer has detected. Some will not illuminate the Check Engine Light. The vehicle...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com