2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1331
DTC P0391
- Exhaust Camshaft Position Sensor Performance Bank 2
DTC P0392
- Exhaust Camshaft Position Sensor Circuit Low Voltage Bank 2
DTC P0393
- Exhaust Camshaft Position Sensor Circuit High Voltage Bank 2
Diagnostic Fault Information
Circuit/System Description
Each camshaft is equipped with a camshaft position sensor that the engine control module (ECM) monitors. The camshaft position sensor is a hall
effect switch that works in conjunction with a 4X reluctor wheel. The reluctor wheels are mounted to the camshaft position actuators that are
mounted to the end of the camshafts. The ECM uses the camshaft position sensor signals in order to determine the position of the camshafts.
The ECM uses the cylinder 1 intake camshaft position sensor to determine injector and ignition system synchronization. Also, the cylinder 1 intake
camshaft position sensor is used to determine camshaft to crankshaft relationship.
The ECM supplies 5 volts to the camshaft position sensors on the 5-volt reference circuits, and supplies a ground on the low reference circuits. The
camshaft position sensors provide a signal to the ECM on the signal circuits. If the ECM detects extra or missing camshaft position sensor signal
transitions, or a signal voltage that is more or less than the predetermined range, within a certain number of crankshaft revolutions, one of these
DTCs sets.
Conditions for Running the DTC
* The ECM detects greater than 10 crankshaft revolutions.
* The engine speed is less than 2,520 RPM.
* The DTCs run continuously once the above condition is met.
Conditions for Setting the DTC
P0341, P0346, P0366, P0391
* The ECM detects a signal from the camshaft position sensor, but the number of pulses are less than or greater than what is expected for one
crankshaft revolution.
OR
* The camshaft position sensor does NOT correlate to the crankshaft position.
* Either condition exists for greater than 1 second, or cumulative of 10 seconds.
P0342, P0347, P0367, P0392
The camshaft position sensor signal voltage is always low and the ECM detects no pulses from the camshaft position sensor for greater than 1
second, or cumulative of 10 seconds.
P0343, P0348, P0368, P0393
The camshaft position sensor signal voltage is always high and the ECM detects no pulses from the camshaft position sensor for greater than 1
second or cumulative of 10 seconds.
Action Taken When the DTC Sets
