2005 Toyota Mark X (GRX121R) Repair Solution

Vehicle Details

Make: Toyota

Model: Mark X (GRX121R)

Year: 2005

Engine: 3.0L 3GR-FSE 6cyl 24v DOHC VVT Direct Inj Petrol Auto

Kilometres: 156,957

Area: Engine

Category: Check Engine Light / MIL - On

Check engine light is on.

The engine light is illuminated and there are fault codes for oxygen sensors, which came back on after new sensors were fitted.

The step-by-step diagnostic process used to identify this fault is available to TaT members.

The detailed fault description and root cause analysis for this 2005 Toyota Mark X (GRX121R) is available to TaT members.

The confirmed repair procedure for this 2005 Toyota Mark X (GRX121R) is available to TaT members. Includes the verified fix and technician tips.

Code	TOYGR05116
Vehicle	2005 Toyota Mark X (GRX121R)
Engine	3.0L 3GR-FSE 6cyl 24v DOHC VVT Direct Inj Petrol Auto
Complaint	Visible
Diag. Sequence	Members Only
Solution	Members Only

Get the complete diagnostic sequence, verified solution, and technician tips.