Timing Reference High Resolution Signal A No Pulses
No pulses detected on timing reference signal A — open circuit, dead sensor, or air gap too wide.
Affected components
- Crankshaft position sensor
Common causes
- High likelihood: Sensor or wiring open
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.