P0121

DTC P0121: Throttle Position (TP) Sensor Circuit Performance Problem

Wiring Diagram:

DTC Detecting Condition and Trouble Area:

DTC Confirmation Procedure

WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and a tester, on a level road.

NOTE:
Check to make sure that the following conditions are satisfied when using this "DTC Confirmation Procedure".
- Intake air temperature: between -14 °C and 70 °C (6.8 °F and 158 °F)
- Atmospheric pressure: higher than 560 mmHg (Altitude: lower than 2790 m (9150 ft))
- The following DTCs are not detected: P0101, P0102, P0103, P0116, P0117, P0118, P0122, P0123, P0335 and P0145

1. With ignition switch OFF, connect scan tool.
2. Turn ON ignition switch and clear DTC by using scan tool if any.
3. Start engine and warm up to normal operating temperature.
4. Increase vehicle till engine speed is reached 3300 - 3700 rpm for 10 sec.
5. Stop vehicle and run engine at idle speed for 10 sec.
6. Check DTC and pending DTC by using scan tool.

Step 1 - 5:

Step 5 (Cont'd) - 7:

DTC Troubleshooting