Camshaft position sensor replacement
The camshaft-position sensor tells the control unit the engine phase; without it, accurate injection and ignition are impossible.
Symptoms
- The engine takes longer to start, runs rough, and a cam/crank correlation fault is stored.
What's included
- When it fails, the engine takes longer to start, runs unevenly, may enter limp mode, and camshaft-correlation faults appear in memory. An important detail is that the same fault occurs with a stretched timing chain, so we check the actual timing before replacing the sensor; otherwise the problem returns and money is wasted. We also assess the wiring and connector. After replacement, we clear stored faults and check operation in different modes.
Additional checks
- Wiring and connector condition
- Clearing stored fault codes after replacement
- Engine operation in different modes after replacement
Why it matters
The same fault appears with a stretched timing chain, so actual cam timing is checked before replacing the sensor — otherwise the problem returns and the part was swapped for nothing.
More details
The camshaft position sensor tells the control unit the engine's timing phase — without it, precise fuel injection and ignition timing are impossible. When it fails, the engine takes longer to start, runs roughly, can go into limp mode, and crank-cam correlation fault codes appear in memory. An important nuance: the same fault code appears with a stretched timing chain, so we check the actual valve timing before replacing the sensor — otherwise the problem would come back and the money would be wasted. We also assess the condition of the wiring and connector. After replacement we clear the fault memory and check operation in different modes.
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