Camshaft Position Sensor A Circuit Malfunction (Bank 2)
The P0345 code indicates that the Engine Control Module (ECM) has detected a malfunction in the camshaft position sensor 'A' circuit on Bank 2 (the side of the engine opposite cylinder #1). This sensor monitors the position of the camshaft relative to the crankshaft, which is critical for proper fuel injection and ignition timing. A fault in this circuit can cause the engine to run poorly or not start at all.
01. Most Common Causes
- Faulty camshaft position sensor
- Wiring or connector issues (open, short, corrosion)
- Damaged reluctor ring or timing chain/belt issues
- ECM failure (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine hard to start or no start
- Rough idle or stalling
- Reduced engine power and poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm P0345 and check for additional codes.
Step 2: Visually inspect the sensor and wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and voltage with a multimeter per manufacturer specs.
Step 4: If sensor is good, check the reluctor ring and timing components for damage or misalignment.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The engine may stall or fail to start, leading to unsafe driving conditions. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
Typically $50-$150 for a new sensor plus labor. If wiring or timing components are involved, costs can be higher.