AutoCodes – Generic – P0291

P0291 Code - Cylinder 11 Injector Circuit Low

Quick Answer

Code P0291 is triggered when the Engine Control Module (ECM) detects a low voltage in the Fuel Injector 11 Circuit. Common causes include Dirty Fuel Injector 11, Faulty Fuel Injector 11, Plugged Fuel Injector 11. 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 Dirty Fuel Injector 11, Faulty Fuel Injector 11, Plugged Fuel Injector 11.
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 Popularity 10,005

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 15, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P0291 Description

Code P0291 is triggered when the Engine Control Module (ECM) detects a low voltage in the Fuel Injector 11 Circuit. During normal conditions, the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.

OBDII Code P0291 - Cylinder 11 Injector Circuit Low - AutoCodes.com — P0291 Code - Cylinder 11 Injector Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0291?

Dirty Fuel Injector 11
Faulty Fuel Injector 11
Plugged Fuel Injector 11
Fuel Injector #11 harness is open or shorted
Fuel Injector #11 circuit poor electrical connection

How to Fix the DTC P0291?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Clogged or partially clogged fuel injector can cause this code. Start by performing an injector flush before replacing the injector.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0291 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0291 code?

Need more information on how to fix the P0291 code? Get Access to Factory Service Manuals

Need Help with the Code?

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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

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.