The two throttle position signals disagree with each other. The driver may notice limited power mode or poor throttle response.
Likely causes, most common first
- Faulty throttle body sensors
- Wiring or connector fault
- Water or dirt in the connector
- Poor ground
Parts usually involved
- Throttle body
- Sensor connector
- Wiring harness
Test before you replace
Compare both signals live while slowly moving the throttle and wiggle test the harness.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.