P0003 OBD-II Trouble Code: Fuel Volume Regulator Control Circuit Low

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red stars EXCELLENT RATING ON

Cost of diagnosing the P0003 code

P0003 is a diagnostic trouble code (DTC) for "Fuel Volume Regulator Control Circuit Low". 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 for $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 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 $154.99 $50.0
Toyota $154.99 $50.0
BMW $164.99 $50.0

*Estimates may vary by market

SCHEDULE P0003 DIAGNOSTIC Get a fair and transparent estimate upfront

P0003 trouble code definition

The P0003 code is associated with the electrical circuit which connects to your fuel pressure regulator.

It also may be related to other codes, such as: P0001, P0002, or P0004.

What the P0003 code means

P0003 is a generic OBD-II code indicating an issue with the engine control module (ECM) reading signals from your fuel pressure regulator on your fuel injection rail mounted to your engine.

The ECM regulates your fuel pressure from your fuel pump going to your engine through this circuit and receives input on your actual fuel pressure, from the fuel pressure sensor. When the computer detects that fuel pressure it is not commanding to the fuel pump, it will set a Check Engine Light and this code. The code will affect fuel economy and possibly damage the engine.

What causes the P0003 code?

The fuel volume regulator control circuit low code may have several causes:

  • Possible corrosion in the sensor connector
  • A short in the sensor wiring to the ECM
  • A defective fuel pressure regulator
  • The ECM is damaged

What are the symptoms of the P0003 code?

The P0003 code will produce a Check Engine Light on the instrument panel/dash and will likely affect:

  • Your engine performance during driving
  • Blown fuses
  • Damage to the ECM
  • Possible stalling while driving
  • It may cause the exhaust to show black or white smoke
  • Fuel economy
  • Damage to the catalytic converter in your exhaust

How does a mechanic diagnose the P0003 code?

P0003 is properly diagnosed with an advanced scan tool capable of factory sensor readings (not just one from an auto parts store). A qualified technician can read the data from the advanced scan tool to determine when the problem occurred, or if it is still occurring. They may clear the code/light and test drive the vehicle while monitoring the scan tool data to see if the fault returns or is present.

Wiring may have to be inspected for damage, which requires cutting open the protective covering, inspecting the wiring harness, and replacing the covering.

Based upon the conditions of the testing, possibly clearing the code, and a road test while monitoring the data, further diagnosis may be required. Diagnosis may require multiple tools such as:

  • An advanced scan tool to read the ECM data values
  • A digital voltage meter with attachments
  • A fuel pressure tester

Common mistakes when diagnosing the P0003 code

  • Just replacing the fuel pressure regulator never guarantees a successful repair in resolving your issue. It may be caused by several components in the fuel system and wiring as listed above or more.

  • A visual inspection and testing with special equipment listed above will verify your issue before unnecessarily replacing the fuel pressure regulator.

  • Electrical signals require evaluation by an advanced scan tool, a voltage meter, and a fuel pressure tester to ensure that the fuel pressure regulator requires replacement or if another problem exists. Additional inspection and testing may be required.

How serious is the P0003 code?

The P0003 fault code could cause your vehicle from running and it can:

  • Lower your fuel economy
  • Cause fuel instability which can cause permanent damage to your engine
  • Damage your catalytic converters (which is an expensive repair)
  • Damage your ECM (which requires special programming)
  • Damage your wiring harness
  • Prevent your vehicle from passing emissions

A qualified technician can diagnose the problem with proper tools and time to verify these potential issues and effects to your other systems.

What repairs can fix the P0003 code?

The most common procedure to repair the P0003 code are as follows:

  • Connect a professional scan tool. Verify the code exists.

  • Check for any other fault codes which may be related to the issue, then clear the fault codes to see which fault codes return.

  • Analyze scan tool data from the ECM.

  • Road test the vehicle while analyzing the scan tool data from the ECM with other tools attached.

  • Verify if the P0003 code returns.

  • Inspect all of the items listed above. (wiring, voltages, etc)

  • Further diagnose the problem with the special tools listed above if the problem appears to repeat. The signals and wiring from the sensor require analyzation to determine where the problem exists. If the signals are fine, then further testing of the the wiring, computer, or fuel system is required.

  • Replace the fuel pressure regulator, wiring, ECM (requires programming), or whatever is faulty.

Additional comments for consideration regarding the P0003 code

Any sensor issue may occur all the time or intermittently. Some fault codes will require additional time to diagnose. With this code, the solution may be simple to replace or require extensive time to diagnose and repair. Depending on your vehicle, it may take several hours to determine the root cause and repair the faulty component.

The P0003 code involves many systems and requires extensive diagnosis. After using a scan tool and monitoring the voltage readings, a qualified technician could determine if the fuel pressure regulator, wiring, or ECM is at fault. With the scan tool connected I typically evaluate the data while checking the voltage meter to ensure all the values are adequate and match specifications and do not have shorts in the circuit. If there is not a specified voltage, then a further diagnosis is required.

The sensor may be the cause, wiring issues might be burning/rubbing on another engine component, rodents may have chewed through wiring anywhere in the vehicle, connectors may have shorts or damage, or you may have a bad ECM caused by the short.

An advanced scan tool with specialty tools inspection is required. Then we will determine where the fault lies. We may clear the fault code/light first, then verify if the check engine light returns, and diagnose further. It may have been an intermittent occurrence from weather or some other factor, or a permanent concern.

Vehicles with higher mileage (over 80,000 miles) may just need a fuel pressure regulator replacement. However, replacing parts based upon a code is not recommended and has caused problems or not resolved the issue.

Need help with a P0003 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 1-800-701-6230.

Check Engine Light
P0003
trouble codes

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0003 code.

SCHEDULE P0003 DIAGNOSTIC
Get a $50 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(8600)

Rating Summary
8017
273
65
46
199
8017
273
65
46
199
 at YourMechanic

Brandon

9 years of experience
133 reviews
Brandon
9 years of experience
Ford Escort L4-2.0L - Check Engine Light is on - Nashville, Tennessee
Brandon showed up ahead of schedule, was very personable and diagnosed my problems. He also scheduled my next appointments which will be with him.
 at YourMechanic

William

23 years of experience
33 reviews
William
23 years of experience
Lexus IS250 V6-2.5L - Check Engine Light is on - Mableton, Georgia
Arrived early which was great. William was courteous, and attentive to the issue. Even though it took several attempts I'm so happy he was determined to fix it and he did!
 at YourMechanic

Dan

40 years of experience
1080 reviews
Dan
40 years of experience
Plymouth Grand Voyager - Check Engine Light is on - Lawrenceville, Georgia
Mr. Dan Barber was quite patient, courteous and quite knowledgeable. From my observation, Mr. Barber appears to be quite professional.
 at YourMechanic

Christopher

9 years of experience
120 reviews
Christopher
9 years of experience
Ford Fiesta L4-1.6L - Check Engine Light is on - Smyrna, Georgia
Chris communicated with us each step of the way up until his arrival. He listened well, was knowledgeable, and was prepared. He took the time to diagnose the problem, explained the what, why and how and provided a solution. I would definitely recommend him and will use him again.


More related articles

P2767 OBD-II Trouble Code: Input/Turbine Speed Sensor B Circuit No Signal
P2767 means there is a problem in the input or turbine speed sensor B due to faulty sensors or solenoids, an electrical issue or transmission fluids.
P0907 OBD-II Trouble Code: Gate Select Position Circuit High
P0907 code means there is an issue within the vehicle's transmission gate select position circuit often due too wiring or rarely, the PCM.
P0680 OBD-II Trouble Code: Cylinder 10 Glow Plug Circuit
P0680 means the system reference voltage allowed by the vehicle’s ECM has exceeded 10% of the allowed variance due to a defective plug, or module.

Related questions

Check engine light
This is true, but there are countless other reasons for an illuminated Check Engine Light (https://www.yourmechanic.com/article/what-does-the-check-engine-warning-light-mean) as well. A loose gas cap will typically set an evaporative emissions (EVAP) system code, such as P0440 (https://www.yourmechanic.com/article/p0440-obd-ii-trouble-code-evaporative-emission-control-system-malfunction-by-jay-safford_2) or P0455 (https://www.yourmechanic.com/article/p0455-obd-ii-trouble-code-system-gross-leak-evaporative-emission-by-john-nelson). The EVAP...
Check engine light turns on and off
Both of these codes are related to the oxygen sensor readings. More often than not, this will be caused by failing oxygen sensors (https://www.yourmechanic.com/services/oxygen-sensor-replacement). There could be other issues that can cause these codes, such as an engine misfire, failing...
I have a 2006 Suzuki Forenza and recently just got the engine replaced. after driving it for a while yesterday the malfunction ind
Without knowing what caused the check engine light to come on or the codes stored it would not be able to be determined if engine damage can occur if you continue to drive it. I would recommend having the codes...

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 (855) 347-2779 · hi@yourmechanic.com