Applicable Systems
OBD-II

Symptoms

CMP sensor signal loss; engine may have extended crank time; possible stalling; fuel sync may be off.

Possible Causes

  • CMP sensor internal failure
  • Sensor wiring open/short
  • Sensor air gap incorrect

Troubleshooting Steps

  1. Step 1: Check CMP sensor resistance
    Resistance within spec
  2. Step 2: Inspect sensor wiring
    Wiring intact
  3. Step 3: Check sensor air gap
    Air gap within spec
  4. Step 4: Replace CMP sensor if faulty
    New sensor signal present
  5. Step 5: Clear code and verify engine starting
    Engine starts quickly

How to Reset

Clear with OBD-II scanner after sensor replacement.

Common Replacement Parts

  • Camshaft Position Sensor (OEM spec)

Frequently Asked Questions

  • Q: Can engine run without CMP sensor?

    Yes, most engines can run using CKP sensor as fallback, but with degraded performance and longer starting time. CMP sensor is for sequential fuel injection timing.

Related OBD-II Generic (SAE J2012) Fault Codes

Source: SAE J2012 standard DTC list + OBD-II portal

Category: OBD-II