Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA ).

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0121)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: DIAGNOSIS / ENHANCED / DTC INFO / CURRENT CODES.

Read the DTC.

Result

RESULT REFERENCE

Display (DTC output)	Proceed to
P0121	A
P0121 and other DTCs	B

B: GO TO DIAGNOSTIC TROUBLE CODE TABLE

A: REPLACE THROTTLE BODY (See REMOVAL )