P0336 DI Crankshaft Position Sensor Performance - With Automatic TransmissionPossible Causes
CKP sensor connector has failed (check pins for damage, and for moisture)
Crankshaft reluctor wheel is damaged or improper installation
Distributor mechanical fault (i.e., too much distributor backlash)
Engine front cover damaged or timing gear is worn excessively
PCM has failed
Tests/Procedures: 1. Confirm the distributor is probably indexed on the splines.
2. Check for erratic high and low resolution signals from the distributor. Backprobe the Red and Black wire and the Purple and White wire in the diagnostic connector on the intake manifold.
3. Confirm the camshaft and crankshaft are the correct part and are identical to the original part.
Tests/Procedures: 1. Use the scan tool to check the CKP Lo Res Angle (Crankshaft Position Sensor Lo Resolution Angle). The value at idle with all accessories off should be between -10 to +7 degrees.
2. If the value falls outside this range stated is step 1, quickly rev the engine once and allow it to return to idle while watching the CKP Lo Res Angle. Does the value change from a positive value on acceleration to a negative value on deceleration?
3. If the value on step 1 is with in specification check the Cyl Mode Misfire Index (located in Misfire data list) with engine idling. Value typically should remain below 1000. If the value is below 1000, use scan tool to note parameters of when the DTC set. Drive vehicle under the same condition and not scan tool to see if it shows the diagnostic failed this ignition.
4. Use a lab scope to check for an erratic signal from Crankshaft Position (CKP) sensor.
Crankshaft Position (CKP) Sensor Connector - Connections at Crankshaft Position (CKP) sensor.
Crankshaft Position Sensor Reluctor Wheel - Crankshaft reluctor wheel damage or improper installation.
Distributor - Excessive distributor drive backlash or other mechanical distributor problem.
Distributor Drive - Excessive distributor drive backlash.
Damaged Front Cover
Mis-Adjusted Sensor - The sensor coming in contact with the reluctor wheel.
Sensor Connector - Poor connections/terminal tension at the sensor.
Worn Timing Chain
Worn Timing Gear