Is it safe to drive with this code?

Driving with a leaking injector can be hazardous and may cause engine damage. External leaks present a fire risk, whilst internal leaks can dilute engine oil, wash down cylinder walls, or in severe cases cause hydro-lock. It's advisable to have the vehicle inspected promptly and avoid extended driving—see our disclaimer for professional guidance.

A fuel leak of any kind can constitute an MOT failure under the fuel system inspection. However, what matters at test time is whether there is visible leakage and whether the malfunction indicator lamp is illuminated. If the light is on when the tester checks, it may result in a failure—see our disclaimer for details.

Roughly how much does it cost to fix?

Repair costs vary considerably depending on whether it's a simple O-ring replacement or full injector replacement, and whether the intake manifold requires removal. For V12 engines, expect high three-figure to four-figure costs. A straightforward seal replacement at an independent garage might fall in the high three-figure range, whilst full injector replacement including labour on complex engines can easily reach four-figure sums. Dealer workshops typically charge more than independent specialists.

Can I just replace one injector or should I do them all?

In many cases, replacing only the faulty injector is acceptable, particularly if the others test within specification. However, on high-mileage engines where injectors have aged similarly, some workshops recommend replacing injectors in banks or sets to ensure even fuel delivery and avoid repeat failures. Professional flow-testing can help determine whether other injectors are nearing the end of their service life.

Professional mechanic working in workshop

← All fault codes | Fuel System

P02C5

Powertrain

Cylinder 11 Injector Leaking

The engine control unit has detected that the fuel injector serving cylinder 11 may be leaking fuel, typically indicating a problem in a high-cylinder-count engine such as a V12.

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ⓘ Information only. This page provides general educational information about fault code P02C5. 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 P02C5 mean?

P02C5 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Cylinder 11 Injector Leaking.

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 Fuel System codes

Fuel system codes cover everything from the tank to the injectors: fuel pumps, filters, pressure regulators, rail pressure sensors, and injectors themselves. On modern common-rail diesels these codes can cause hard starting, limp mode, or no-start conditions.

P02C5 is one of 469 codes in this category. Browse all Fuel System codes →

What we know about P02C5 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 P02C5.

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 P02C5 in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P02C2 Cylinder 11 Fuel Trim at Max Limit

P02C3 Cylinder 11 Fuel Trim at Min Limit

P02C4 Cylinder 11 Injector Restricted

P02C6 Cylinder 12 Fuel Trim at Max Limit

P02C7 Cylinder 12 Fuel Trim at Min Limit

P02C8 Cylinder 12 Injector Restricted

Other Fuel System codes

Other fault codes in the same system as P02C5. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

P0087

Fuel Rail/System Pressure - Too Low Detailed guide

P0089

Fuel Pressure Regulator 1 Performance Detailed guide

P0090

Fuel Pressure Regulator Control Circuit/Open Detailed guide

P0100

Mass or Volume Air Flow (MAF) Circuit Malfunction Detailed guide

P0106

Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem Detailed guide

P0170

Fuel Trim Malfunction (Bank 1) Detailed guide

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with P02C5 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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