Diagnostic Aids

The following problems may cause this DTC to set:

• Poor connections.
• Crankshaft reluctor wheel damage or improper installation.
• The sensor coming in contact with the reluctor wheel.
• The engine running out of fuel.
• If the crankshaft rotates backwards, this DTC sets. This condition is only with vehicles equipped with a manual transmission. This condition can occur when a vehicle is on an incline and the clutch is released and an engine stall occurs.

Excess crankshaft end play will cause the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in any one of the following conditions:

• A no-start
• A start and stall
• Erratic performance

An improperly installed crankshaft could cause excess crankshaft end play.

For an intermittent, see INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.