Is it safe to drive with this code?

Continued driving may carry some risk, as the reverse inhibit safety system could be disabled—meaning the gearbox might potentially engage reverse whilst moving forward, or conversely, you may find yourself unable to select reverse at all. For short distances to reach a garage this is often manageable, but the fault should be addressed promptly; see our liability disclaimer for further guidance.

The code itself does not constitute an automatic MOT failure, but if the malfunction indicator lamp is illuminated at the time of the test, this may result in a fail under emissions and systems checks. What matters is the state of the warning light during the inspection; see our MOT disclaimer for complete information.

Roughly how much does it cost to fix?

Repair costs typically range from low three-figure sums for straightforward jobs such as replacing a faulty reverse inhibit switch or repairing damaged wiring, up to mid-to-high three-figure amounts if the transmission control module or powertrain control module requires replacement. Costs vary depending on parts availability, labour rates, and whether you use an independent garage or main dealer—always obtain multiple quotes.

Can I just clear the code and continue driving?

Clearing the code without addressing the underlying cause may offer temporary relief, but the fault is likely to return if the circuit malfunction persists. It is advisable to diagnose and repair the root cause to ensure the reverse inhibit safety system functions correctly and to prevent potential transmission damage or safety issues.

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← All fault codes | Electrical & Sensors

P0801

Powertrain

Reverse Inhibit Control Circuit Malfunction

The engine control unit has identified a potential fault in the electrical circuit that manages the reverse inhibit system, which typically prevents the gearbox from engaging reverse gear whilst the vehicle is moving forwards.

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ⓘ Information only. This page provides general educational information about fault code P0801. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does P0801 mean?

P0801 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Reverse Inhibit Control Circuit Malfunction.

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About Electrical & Sensors codes

Codes in the Electrical & Sensors category.

P0801 is one of 4,010 codes in this category. Browse all Electrical & Sensors codes →

What we know about P0801 specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for P0801.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to P0801 in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P07BC Transmission Park Position Sensor/Switch B Circuit Performance High

P07BD Transmission Park Position Sensor/Switch B Circuit Intermittent/Erratic

P07BE Transmission Park Position Sensor/Switch A/B Circuit Correlation

P0802 Transmission Control System MIL Request Circuit/Open

P0803 1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction

P0804 1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction

Other Electrical & Sensors codes

Other fault codes in the same system as P0801. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

B1257

Air Temperature External Sensor Circuit Short To Ground Detailed guide

B1363

DBPT Circuit Short To Ground Detailed guide

B2100

Ignition Run/Start Input Circuit Performance Detailed guide

C2000

Steering Angle Sensor Not Calibrated Detailed guide

P0030

HO2S Heater Control Circuit (Bank 1 Sensor 1) Detailed guide

P0031

Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) Detailed guide

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with P0801 can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

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