Camshaft Position Sensor ‘B’ Circuit Range/Performance Bank 2
Table of contents
P0391 HYUNDAI Possible Causes
- Faulty Camshaft Position Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How do I fix code P0391 HYUNDAI?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0391 HYUNDAI code
The cost of diagnosing the P0391 HYUNDAI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
The camshaft position sensor signal sent to the Engine Control Module (ECM) during the first few seconds of engine cranking is out of range.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall
P0391 HYUNDAI Description
The Camshaft Position Sensor (CMPS) is a sensor that detects the compression Top Dead Center (TDC) of the NO. 1 cylinder. The CMPS consists of a hall type sensor and a target on the end of the intake camshaft. When the target triggers the sensor, the sensor voltage is 5V. If not, the sensor voltage is 0V. These CMPS signal is sent to the Engine Control Module (ECM) and the ECM uses the CMPS signal for synchronizing the firing of sequential fuel injectors.