P2621 Possible Causes
- Faulty throttle position sensor/switch
- Throttle position sensor/switch harness is open or shorted
- Poor electrical connection in throttle position sensor/switch circuit
How to Fix Code P2621
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Illuminated engine light (or service engine soon warning light)
P2621 Meaning
The Engine Control Module (ECM) monitors the throttle position circuit signal. The ECM sets the OBDII code when the throttle position circuit signal is outside factory specifications.