DTC C1201: Engine Control System Malfunction: Procedure
WARNING: This page is about a different car, the 2009 Lexus IS 350 and 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK ENGINE CONTROL SYSTEM
- Check if any engine control system DTC is output. Refer to DTC CHECK / CLEAR
for 2GR-FSE, or refer to DTC CHECK / CLEAR
for 4GR-FSE).
Result
Result Proceed to DTC is not output (for 2GR-FSE) A DTC is not output (for 4GR-FSE) B DTC is output (for 2GR-FSE) C DTC is output (for 4GR-FSE) D
D → See step 5
C → See step 4
B → See step 3
A → See step 2
- Check if any engine control system DTC is output. Refer to DTC CHECK / CLEAR
for 2GR-FSE, or refer to DTC CHECK / CLEAR
for 4GR-FSE).
- REPLACE ECM (for 2GR-FSE). Refer to REMOVAL
- REPLACE ECM (for 4GR-FSE). Refer to REMOVAL
- INSPECT ENGINE CONTROL SYSTEM (for 2GR-FSE). Refer to DIAGNOSTIC TROUBLE CODE CHART
- INSPECT ENGINE CONTROL SYSTEM (for 4GR-FSE). Refer to DIAGNOSTIC TROUBLE CODE CHART