General Information

Engine Control
P0018 Crankshaft Position-Camshaft Position Correlation (Bank 2 Sensor A) - General Information

Component Location





General Description

A Crankshaft Position Sensor (CKPS) is a magnetic type sensor that generates voltage using a sensor and a target wheel mounted on the crankshaft. The PCM calculates engine RPM by using the sensor's signal and controls the injection duration and the ignition timing.
Camshaft Position Sensor (CMPS) is a hall sensor and detects the camshaft position by using a hall element. It is related with Crankshaft Position Sensor (CKPS) and detects the piston position of the each cylinder which the CKPS can't detect. This CMPS signal is sent to the PCM and it uses CMPS signals for determining the ignition timing with CKPS signals. CMPS makes Sequential Injection possible.

DTC Description

If the deviation between CKPS and CMPS (IN-CMPS Bank 2) is bigger than the threshold value, ECM sets DTC P0018.

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data




Fig.1) Normal waveform of CKPS & IN-CMPS Bank 2 at idle.