Inspection Procedure

NOTE
TSB No. 2804, "MIL "ON" DTC P030# and/or Intermittently Runs Rough" MUST be performed after the procedures in this bulletin to complete the overall repair.

1. Using ETAS Techstream, verify that one or more of the following DTCs are stored:
- P0300 - Random Misfire Detected
- P0301 - Cylinder 1 Misfire Detected
- P0302 - Cylinder 2 Misfire Detected
- P0303 - Cylinder 3 Misfire Detected
- P0304 - Cylinder 4 Misfire Detected
- P0305 - Cylinder 5 Misfire Detected
- P0306 - Cylinder 6 Misfire Detected

NOTE
If any other DTCs are present, refer to the Repair Manual for diagnostic information as this TSB does NOT apply.

2. Perform misfire diagnosis.
Refer to the Technical Information System (TIS), 2006 model year IS250 Repair Manual, Engine/Hybrid System - Engine Control - "4GR-FSE Engine Control System: SFI System: P0300: Random / Multiple Cylinder Misfire Detected".

NOTE
Normal mechanical engine condition, engine control system, fuel supply/injection systems, and ignition system operation must be present or this TSB does NOT apply.

3. If the concern is NOT resolved after following the Repair Manual misfire diagnosis, replace the valve springs, the valve spring retainers, and the valve lash adjusters using the Repair Procedures below.