Toyota Celica 2005 Repair Manual page 644

4 Inspect EFI relay (See page SF−56).
OK
5 Check for open and short in harness and connectors between ECM and heated
oxygen sensor (See page IN−30).
OK
6 Perform confirmation of driving pattern.
GO
7 Is DTC P0136 or P0138 output again?
YES
Replace heated oxygen sensor.
2005 CELICA (RM1131U)
DIAGNOSTICS − ENGINE (2ZZ−GE)
NG Replace EFI relay.
NG Repair or replace harness or connector.
NO Check for intermittent problems
(See page DI−295).
643
DI−445