P0391 Trouble Code

View P0391 obd/2 error code description and symptoms. P0391 engine photo

Throttle Position (TP) Sensor Intermittent The TP sensor circuit is monitored by the PCM for sudden TP rotation angle (or voltage) input change through the comprehensive component monitor (CCM). If during the last 80 warm-up cycles in key ON engine running the PCM detects a TP rotation angle (or voltage) changes beyond the minimum or maximum calibrated limit, a continuous diagnostic trouble code (DTC) is stored. Poor continuity through the TP sensor connectors Poor continuity through the TP harness Intermittent open or short inside the TP sensor While accessing the TP V PID on the scan tool, lightly tap on the TP sensor or wiggle the TP sensor connector and harness.

At this point we are assuming that the fuses and relays are good. You will need to locate the PCM/TCM and the power input signal circuit using your vehicle information source. Unplug the connector from the PCM/TCM, place the ignition switch in the ON position, and probe the appropriate circuit with the positive test lead of the DVOM.

P0391 Error Code Repair Process :

If your p0391 camshaft position sensor b circuit range/performance bank 2 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 P0391 and engine control unit are in charge of monitoring a bunch of different p0391 camshaft position sensor b circuit range/performance bank 2, and if they get a reading that's a little out of whack, up pops the check engine light.

P0391 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 P0391

A common cause of code P0391 is the failure of P0391 Camshaft Position Sensor B Circuit Range/Performance Bank 2, but there are several other possible causes as well, such as ;

Damaged VCT phaser
Continuous oil flow to the VCT piston chamber
Ignition coils harness is open or shorted
Erratic camshaft position due to low oil pressure

P0391 code for all cars

You can view according P0391 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P0391 Chevrolet Evanda

+P0391 Porsche 356

+P0391 Bmw Z3

+P0391 Italdesign Machimoto

+P0391 Chrysler Centura

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

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