CMP/CKP Sensor Signals Not Compatible

What this code means

The ECM detected that the camshaft position sensor and crankshaft position sensor signals are not in the expected correlation. The timing relationship between the two sensors is outside acceptable limits, indicating a potential timing issue.

Symptoms

• Check Engine Light
• Engine may not start
• Rough running
• Loss of power
• Misfires

Common causes

• Timing belt or chain jumped a tooth
• Faulty camshaft position sensor
• Faulty crankshaft position sensor
• Tone wheel damage on camshaft or crankshaft
• Timing belt tensioner failure

Diagnostic steps

1. Check timing belt/chain alignment marks
2. Test CMP sensor signal with oscilloscope
3. Test CKP sensor signal
4. Inspect timing belt/chain tensioner
5. Compare CMP/CKP correlation pattern

Repair notes

Verify timing belt or chain alignment; replace sensors or timing components as needed.

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