Camshaft Position Sensor B Range / Performance
The engine computer detected that the camshaft position sensor B is sending signals outside its expected range, like a speedometer needle jumping erratically instead of moving smoothly. This prevents the ECU from properly timing the intake or exhaust valves, affecting engine performance.
The ECU monitors camshaft B position sensor voltage and its correlation with crankshaft timing. It expects smooth, consistent signals within a specific frequency and voltage range as the cam rotates. If the signal timing drifts or the voltage stays out of bounds, the ECU cannot accurately control valve timing and triggers the fault.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor Voltage | 0.5V to 4.5V oscillating | Below 0.2V or above 4.8V sustained |
| Cam-to-Crank Timing Correlation | Within ±5° crankshaft degrees | Beyond ±10° deviation |
Code P1349 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P1349 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.