STEP 1. Check the throttle position sensor.
WARNING: This page is about a different car, the 2002 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
- Using scan tool MB991502.
- Connect scan tool MB991502 to the data link connector. See Figure.
- Turn the ignition switch to the "ON" position.
- Read the MFI-DTC.
- Turn the ignition switch to the "LOCK" (OFF) position.
Is the MFI-DTC P0120 output?
- YES
For 2.4L engine, see SELF DIAGNOSTICS - 2.4L article in ENGINE PERFORMANCE. For 3.0L engine, see SELF-DIAGNOSTICS - 3.0L article in ENGINE PERFORMANCE. - NO
Go to Step 2 .