The P0291 trouble code is associated with Cylinder 11 Injector Circuit Low, indicating a low voltage condition in the circuit for the fuel injector in Cylinder 11. This code is commonly found in vehicles with multi-port fuel injection systems.
Cylinder 11 Injector Circuit Low
Code symptoms P0291.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Poor engine performance in Cylinder 11.
3. Rough idling or misfires in Cylinder 11.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0291.
1. Low voltage condition in the circuit for the fuel injector in Cylinder 11.
2. Wiring issues in the injector circuit for Cylinder 11.
3. Faulty fuel injector in Cylinder 11.
Code Solutions P0291.
1. Address and rectify any low voltage conditions in the circuit for the fuel injector in Cylinder 11.
2. Inspect wiring in the injector circuit for Cylinder 11 and repair or replace damaged sections.
3. If the fuel injector in Cylinder 11 is faulty, replace it.