P0291 Code - Cylinder 11 Injector Circuit Low
Quick Answer
The diagnostic trouble code P0291 indicates a problem with the Cylinder 11 Injector Circuit in the vehicle's engine. Common causes include Faulty fuel injector, Damaged wiring or connectors in the injector circuit, Clogged fuel injector. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0291 indicates Cylinder 11 Injector Circuit Low.
- Common causes
- Common causes include Faulty fuel injector, Damaged wiring or connectors in the injector circuit, Clogged fuel injector.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0291 Description
The diagnostic trouble code P0291 indicates a problem with the Cylinder 11 Injector Circuit in the vehicle's engine. In a multi-cylinder engine, each cylinder has its own fuel injector responsible for delivering the precise amount of fuel needed for combustion. When the Engine Control Module (ECM) detects that the voltage in the injector circuit for Cylinder 11 is lower than expected, it triggers this code.
Common Causes of P0291
- Faulty fuel injector
- Damaged wiring or connectors in the injector circuit
- Clogged fuel injector
- ECM malfunction
- Fuel system issues
Symptoms of P0291
- Engine misfires
- Rough idling
- Decreased fuel efficiency
- Loss of power
- Illuminated check engine light
How to Fix P0291
- Perform a thorough inspection of the injector circuit for Cylinder 11, checking for any damaged wiring or connectors.
- Test the fuel injector for proper operation and flow.
- Clean or replace the fuel injector if necessary.
- Clear the diagnostic trouble codes from the ECM and perform a test drive to ensure the issue has been resolved.
- If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the issue.
Cost to Fix P0291
The typical repair costs for addressing a Cylinder 11 Injector Circuit Low issue can vary depending on the specific cause of the problem. In general, the cost of parts such as a new fuel injector or wiring components can range from $100 to $500. Labor costs at auto repair shops typically range from $80 to $150 per hour. Additional diagnostic time may also be needed, which can add to the overall cost. It's recommended to consult with a qualified mechanic to get an accurate estimate based on the vehicle's make and model, as well as the extent of the repair needed.
Tech Notes for P0291
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Code P0291 Information for Specific Makes
- P0291 Audi — Cylinder 11 Injector Circuit Low
- P0291 Mercedes-Benz — Cylinder 11 Injector Circuit Low
- P0291 Volkswagen — Cylinder 11 Injector Circuit Low
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