What the OBD-II code p0089 means

Fault code P0089 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P0089 – Fuel Pressure Regulator 1 Performance
P0089
Search your trouble code

P0089: causes, symptoms and repairs

The meaning of fault code P0089

DTC P0089 is triggered when the powertrain control module (PCM) detects that there is a problem with the petrol or diesel fuel pressure regulator. The regulates the amount of fuel that gets sent to the injectors, helping to maintain a steady fuel pressure. It is usually either integrated with the fuel rail assembly or a part of the fuel pump module. This code indicates that the fuel pressure is not within the manufacturer’s specifications.

What causes code P0089?

  • Blocked fuel lines or a clogged diesel or petrol fuel filter. The flow of fuel can be restricted if the fuel lines are pinched and contaminants build up in the system. The filter can get too dirty, dirt can get into the fuel tank, and corroded bits of metal can end up in the fuel pump causing a blockage.
  • A defective pressure regulator. This is often due to internal damage or a short circuit. The membrane is more vulnerable to damage on mechanical devices.
  • A faulty sensor, sending incorrect signals to the PCM.
  • A bad fuel pump. The required pressure might not be attainable if the pump output is insufficient.
  • Leaks in the system, caused by worn or damaged seals, cracked hoses, or loose clamps/hoses.
  • A broken pressure relief valve, stopping the regulation of fuel pressure.
  • Faulty wires or short circuits in the fuel pressure rail sensor or regulator. This could be the result of overheating, mechanical wear, or exposure to harsh chemicals.
Symptoms to look out for

  • Poor acceleration
  • Increased fuel consumption
  • Lean or rich engine conditions
  • A loss of power
  • Rough idling and hesitation
  • Activation of the check engine light
  • Starting difficulties and stalling while driving
Recommended repairs

  • To identify the cause, you will need a proper diagnosis. Scan the onboard computer to check whether any other DTCs are present, as well as the freeze frame data for important details. For example, related codes may include P0091 (Fuel Pressure Regulator 1 Control Circuit Low), P0092 (Fuel Pressure Regulator 1 Control Circuit High, or P0230 (Fuel Pump Primary Circuit Malfunction).
  • You can check whether the fuel pressure sensor is working by attaching a gauge to the fuel rail to measure the actual pressure. If it is within the specified range, it is likely that the PCM is receiving inaccurate information. Replace the sensor if necessary. This can also be tested using an advanced scan tool, such as an OBD2 scanner. If it is too low, continue with the diagnostic checks.
  • Inspect the fuel pump components and wiring harness. If you are able to access the pump terminals, you can measure its voltage using a digital voltmeter. Compare the reading with the manufacturer’s specifications. Look for damaged, dirty or loose wires and repair as required. If the component is damaged or faulty, install a new one.
  • Replace any damaged hoses and examine the lines for blockages. It may be necessary to flush the fuel lines and bleed the system to unclog it. Change the filter if it is clogged or approaching the end of its service life.
  • Fix any fuel or vacuum leaks by replacing damaged seals and hoses, and tightening loose clamps or securing the fuel lines.
Frequently Asked Questions (FAQ)

What does the code “P0089” mean?


It means that the fuel pressure regulator is malfunctioning or the fuel pressure isn’t within the specified range.

What causes it to appear?


It could be due to internal damage or a short circuit, a bad fuel pump, a defective sensor, or leaks in the system.

Can I still drive my car if this occurs?


This is advised against as it could cause serious driveability issues. If the fuel pump fails, the vehicle could stop running or might not start at all. Other symptoms may include misfires or a rough engine, reducing the stability of the vehicle and increasing the risk of an accident.

Cars the fault code P0089 is most commonly found on

Fault code P0089 - Fuel Pressure Regulator 1 Performance can occur with any car but is most often found on the following cars:

  • Nissan: Note, Qashqai, Navara
  • Renault: Master, Trafic, Kangoo
  • Mitsubishi: Triton, L200
  • Fiat: Doblo, Ducato
  • Volvo: S40, V50
  • Chevrolet: Captiva, Cruze

If you get the code P0089 on your car, make sure that the diagnostics are carried out correctly and the error is still relevant. Check for symptoms associated with the problem and explore options for resolving it.

What to do if the fault code p 0089 appears

Most viewed car repair videos

  • Error p0089: a step-by-step diagnosis and repair guide
    How to change front wheel bearing on MERCEDES-BENZ M W163 TUTORIAL | AUTODOC
  • Error p0089: a step-by-step diagnosis and repair guide
    How to change fuel filter BMW 3 (E90) [TUTORIAL AUTODOC]
  • Error p0089: a step-by-step diagnosis and repair guide
    How to change Front wheel bearing on VW GOLF 4 TUTORIAL | AUTODOC
  • Error p0089: a step-by-step diagnosis and repair guide
    How to change a rear brake pads FORD FOCUS 3 TUTORIAL | AUTODOC
  • Error p0089: a step-by-step diagnosis and repair guide
    How to change pollen filter / cabin filter on AUDI A6 (C6) [TUTORIAL AUTODOC]
  • Error p0089: a step-by-step diagnosis and repair guide
    How to change rear brake discs and brake pads on PEUGEOT 307 [TUTORIAL AUTODOC]
  • Error p0089: a step-by-step diagnosis and repair guide
    How to change fuel filter NISSAN X-TRAIL T30 TUTORIAL | AUTODOC
  • Error p0089: a step-by-step diagnosis and repair guide
    How to change front wheel bearing TOYOTA YARIS XP10 TUTORIAL | AUTODOC
Want to get more useful information?

Ask questions or share your repair experience on the car forum. Subscribe to updates so you don't miss out on new guides.

Everything you need to know about the code P0089
Tips from AUTODOC CLUB
View more
  • Life hacks for the code P0089
    How to choose the right engine oil for your car | AUTODOC
  • Fast fixes for the OBD2 code p0089
    How to paint a brake caliper | AUTODOC tips
  • The most common causes of code p 0089
    How to check your head gasket | AUTODOC
  • Advice on what to do about the error P0089
    Top 5 mistakes when working in the engine bay | AUTODOC tips
Install the AUTODOC CLUB app!
Your personal car expenses manager, maintenance tips, reminders about upcoming appointments and service intervals, DIY repair instructions – all this on your phone.
QR-code scan for AUTODOC CLUB app
Scan

To download the app:

  • - scan the QR code
  • - download from App Store
  • - download from Google Play
Autodoc CLUB App icon
Your profile is your personal assistant.

It can track car expenses, keep a car log and replacement schedule, and save favourite materials, notes and documents