October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

1. Problem Verification

Turn ignition switch to ON position
Using a Hi-Scan (Pro), monitor the TPS signals while slowly opening the throttle.
- Refer to DTC P0121 SPECIFICATIONS for more information.

Is signal within specification and consistent with the normal curve?

No: Go to next step.

Yes: Problem is intermittent or was repaired and engine control module memory was not cleared. Proceed with intermittent problem procedure.