Crankshaft Position Sensor A Circuit Range/Performance
The P0336 code indicates that the Engine Control Module (ECM) has detected a signal from the crankshaft position sensor that is out of the expected range or performance parameters. This sensor monitors the rotational speed and position of the crankshaft, which is critical for engine timing, fuel injection, and ignition. A faulty sensor, wiring issues, or mechanical problems like a damaged reluctor ring can cause this code.
01. Most Common Causes
- Faulty crankshaft position sensor
- Damaged or loose wiring/connectors to the sensor
- Excessive air gap between sensor and reluctor ring
- Damaged or missing reluctor ring teeth
- Engine mechanical issues (e.g., timing chain slack)
02. Symptoms You Will Notice
- Engine cranks but does not start
- Intermittent stalling or rough idle
- Check Engine Light illuminated
- Engine misfire or hesitation during acceleration
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the crankshaft position sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and signal output using a multimeter or oscilloscope per manufacturer specs.
Step 4: Check the reluctor ring for damage or missing teeth (may require removing the sensor or using a borescope).
Step 5: If sensor and wiring are good, inspect engine timing components (e.g., timing chain/belt) for slack or misalignment.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not recommended. The engine may stall unexpectedly or fail to start, posing a safety risk. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
Typically $50-$150 for a DIY sensor replacement, or $150-$300 at a shop including labor. Additional costs if wiring or mechanical repairs are needed.