Is it safe to drive with this code?

It depends on the symptoms present. If the vehicle is stalling, experiencing severe shifting difficulties, or operating in limp mode, driving should be limited. For milder symptoms, a prompt diagnosis is still advisable—see our disclaimer for more guidance.

This code may affect the MOT if the malfunction indicator lamp is illuminated at the time of the test, as that forms part of the emissions and safety checks. However, each case can vary—consult our disclaimer for full MOT considerations.

Roughly how much does it cost to fix?

Repair costs typically fall into the low to mid three-figure range, depending on whether the issue is a simple sensor alignment or requires wiring repair or sensor replacement. Labour rates vary between independent garages and main dealers, and diagnostic time can add to the total.

Can I clear the code and keep driving?

Clearing the code without addressing the underlying fault will usually cause it to return after a few drive cycles. It is best to diagnose and repair the root cause to avoid transmission damage or unsafe driving conditions.

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← All fault codes | Electrical & Sensors

P0904

Powertrain

Gate Select Position Circuit

The engine control module has detected an implausible or faulty signal from the gate select position sensor, which typically monitors the gear position selected by the driver.

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ⓘ Information only. This page provides general educational information about fault code P0904. 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 P0904 mean?

P0904 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Gate Select Position Circuit.

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.

P0904 is one of 4,010 codes in this category. Browse all Electrical & Sensors codes →

What we know about P0904 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 P0904.

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 P0904 in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P0901 Clutch Actuator Circuit Range/Performance

P0902 Clutch Actuator Circuit Low

P0903 Clutch Actuator Circuit High

P0905 Gate Select Position Circuit Range/Performance

P0906 Gate Select Position Circuit Low

P0907 Gate Select Position Circuit High

Other Electrical & Sensors codes

Other fault codes in the same system as P0904. 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 P0904 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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