Toyota Celica 2005 Repair Manual page 625

DI−426
A high heated oxygen sensor (sensor 1) voltage (0.5 V or more) could be caused by a rich air fuel mix-
S
ture. Check for conditions that would cause the engine to run rich.
A low heated oxygen sensor (sensor 1) voltage (0.4 V or less) could be caused by a lean air fuel mix-
S
ture. Check for conditions that would cause the engine to run lean.
1 Are there any other codes (besides DTC P0133) being output?
PREPARATION:
(a) Connect the hand−held tester or the OBD II scan tool to the DLC3.
(b) Turn the ignition switch ON and push the hand−held tester or the OBD II scan tool main switch ON.
(c) When using hand−held tester, enter the following menu: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / CURRENT CODES."
CHECK:
Read the DTCs.
RESULT:
Display (DTC output)
P0133 and other DTC
HINT:
If any other codes besides P0133 are output, perform the troubleshooting for those DTCs first.
A
2005 CELICA (RM1131U)
DIAGNOSTICS
P0133
− ENGINE (2ZZ−GE)
B Go to relevant DTC chart (See page DI−335).
624
Proceed to
A
B