Applicable Systems
OBD-II
Symptoms
Crankshaft position sensor signal loss; engine may not start or may stall; RPM display may not work.
Possible Causes
- CKP sensor internal failure
- Sensor wiring open/short
- Sensor air gap incorrect
- Flywheel reluctor wheel damaged
Troubleshooting Steps
- Step 1: Check CKP sensor resistance (500-1500 ohm)
Resistance within range - Step 2: Inspect sensor wiring for damage
Wiring intact - Step 3: Check sensor air gap (0.5-1.5mm)
Air gap within spec - Step 4: Inspect flywheel reluctor wheel for damage
All teeth intact - Step 5: Replace CKP sensor if faulty
Engine starts and runs normally
How to Reset
Clear with OBD-II scanner after sensor replacement; may require crank position relearn.
Common Replacement Parts
- Crankshaft Position Sensor (OEM spec)
Frequently Asked Questions
- Q: Does CKP sensor replacement require relearn?
Some vehicles require CKP sensor variation relearn using OBD-II scanner. This teaches ECM the exact sensor signal pattern for precise timing.
Comments (0)
Share your experience to help others facing the same problem.
Leave a Comment
Source: SAE J2012 standard DTC list + OBD-II portal
Category: OBD-II
No comments yet. Be the first to share your experience!