Throttle Actuator B Control Module Processor
The processor monitoring throttle B inside the throttle/PCM has reported a self-test failure — RAM check, ROM check, or watchdog timeout.
Affected components
- Throttle control module
- Powertrain control module
Common causes
- High likelihood: Internal processor fault
- Low likelihood: Module software outdated, reflash may resolve
- Low likelihood: Supply voltage outside specification
Possible symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
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.