IS 250 AWD V6-2.5L (4GR-FSE) (2006)
Refer to the Technical Information System (TIS) 2006 model year IS 250 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
TSIB 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.
Repair Procedure Disassembly
1. Disconnect the cable from the negative (-) battery terminal.
2. Remove the cool air intake duct seal by removing the 11 clips.
3. Remove the engine compartment side cover LH by removing the 5 clips.