Crankshaft Position Sensor Circuit Low Voltage
The P2618 code indicates that the crankshaft position sensor signal circuit is reading lower than expected voltage. This sensor is critical for engine timing and fuel injection synchronization. A low signal can be caused by a faulty sensor, damaged wiring, or poor electrical connections. The ECM detects this anomaly and triggers the code, often leading to starting difficulties or engine stalling.
01. Most Common Causes
- Faulty crankshaft position sensor
- Damaged or shorted wiring in sensor circuit
- Poor electrical connection at sensor or ECM
- Corroded or loose sensor connector
02. Symptoms You Will Notice
- Engine cranks but does not start
- Engine stalls intermittently
- Check Engine Light illuminated
- Rough idle or misfire
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the crankshaft position sensor connector and wiring for damage or corrosion.
Step 3: Test sensor resistance and voltage output with a multimeter per manufacturer specifications.
Step 4: Check for continuity and shorts in the signal circuit between sensor and ECM.
Step 5: If all tests pass, replace the crankshaft position sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The engine may stall unexpectedly or fail to start, leading to a breakdown or accident.
How much does it cost to fix?▼
Typically between $50 and $150 for parts and labor, depending on vehicle make and sensor accessibility.