P0291 Trouble Code

View P0291 obd/2 error code description and symptoms. P0291 engine photo

Engine Coolant Temperature (ECT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The ECT sensor maximum is 4.6 volts or -50 C (-58 F). Note on some vehicles that are not equipped with an ECT sensor, CHT can be used and can set this DTC. Open circuit in harness Sensor signal short to power Damaged PCM Improper harness connection Damaged sensor ECT V PID reading greater than 4.6 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

Difficulty Level (Easy)
Level
Repair Time (20 Min.)
Time
Cost Prediction : $ 40-75

P0291 Error Code Repair Process :

If your p0291 cylinder 11 injector circuit low check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P0291 and engine control unit are in charge of monitoring a bunch of different p0291 cylinder 11 injector circuit low, and if they get a reading that's a little out of whack, up pops the check engine light.

Wrench Tool P0291 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Common Causes of P0291

A common cause of code P0291 is the failure of P0291 Cylinder 11 Injector Circuit Low, but there are several other possible causes as well, such as ;

P0291 code for all cars

You can view according P0291 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P0291 Ford Crown Victoria +P0291 Dutton B-plus +P0291 Peugeot 107 +P0291 Isuzu I-290 +P0291 Puma Mini

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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