Camshaft Position Sensor Signal Circuit Low
The P2615 code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the camshaft position sensor signal circuit. This sensor monitors the position of the camshaft relative to the crankshaft, which is critical for proper fuel injection and ignition timing. A low signal can be caused by a faulty sensor, damaged wiring, poor electrical connections, or a short to ground. This condition can lead to engine performance issues such as rough idling, stalling, or difficulty starting.
1. Most Common Causes
- Faulty or worn camshaft position (CMP) sensor
- Short to ground in the CMP output signal circuit
- Corroded, loose, or high-resistance connections in the sensor harness
- Internal ECM/PCM failure (less common)
- Blown fuse or defective power relay affecting sensor reference voltage
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Hard starting or stalling
- Reduced fuel economy
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the camshaft position sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and voltage output with a multimeter according to manufacturer specifications.
Step 4: Check for a short to ground in the signal circuit by disconnecting the sensor and measuring resistance between the signal wire and ground.
Step 5: If the sensor and wiring are okay, test the ECM's ability to receive the signal by backprobing the ECM connector.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause engine stalling or poor performance, which may lead to unsafe driving conditions.
How much does it cost to fix?▼
The cost typically ranges from $150 to $300, including parts and labor, depending on the vehicle and the exact cause.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.