DTC U0120 Chevrolet
Crankshaft Position - Camshaft Position Correlation - Bank 1 Sensor B
Crankshaft Position - Camshaft Position Correlation - Bank 1 Sensor B
Description
The powertrain control module (PCM) monitors the variable camshaft timing (VCT) position for a misalignment between the camshaft and crankshaft. The test fails when the misalignment is 1 tooth or greater. This DTC can also set due to VCT system concerns (oil contamination or VCT solenoid stuck).
Cause and Solution
Camshaft timing incorrectly setContinuous oil flow to the VCT piston chamberErratic camshaft position due to low oil pressureOil flow restriction in the oil passages or the VCT valve bodyVCT solenoid stuck in positionOpen or short in the VCT circuitOpen VPWR circuitCamshaft advance mechanism binding (VCT unit)Damaged VCT phaserDamaged camshaft position (CMP) sensorOpen or short in the CMP sensor circuitsRadio frequency interference
Diagnosis:
Video Guide
Diagnostic Info
- DTC Code: U0120
- Brand: Chevrolet