Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Crankshaft Position Sensor: Testing and Inspection

The scan tool scan tool displays Crankshaft Position Sensor (CKP) data as engine speed (RPM). An error in the crankshaft position sensor circuit should set a Diagnostic Trouble Code (DTC) P0335, P0337, P0335, or a P0339. Refer to DTC P0336 CKP Sensor Circuit Performance or DTC P0337 CKP Sensor Circuit Low Frequency or DTC P0338 CKP Sensor Circuit High Frequency or DTC P0339 CKP Sensor Circuit Intermittent. Testing and Inspection