Toyota Camry Manual page 1273

DI–246
1 Are there any other codes (besides DTC P0125) being output ?
NO
2 Connect OBD II scan tool or TOYOTA hand–held tester, and read value for
voltage output of heated oxygen sensors (bank 1, 2 sensor 1).
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand–held tester to the DLC3.
(b) Warm up the engine to normal operating temp.(above 75°C (169°F)).
CHECK:
Read voltage output of the heated oxygen sensors (bank 1,2 sensor 1) when engine is suddenly raced.
HINT:
Perform quick racing to 4,000 rpm 3 times using accelerator pedal.
OK:
Heated oxygen sensors (bank 1, 2 sensor 1) output a RICH signal
(0.45 V or more) at least once.
NG
3 Check for open and short in harness and connector between ECM and heated
oxygen sensors (bank 1, 2 sensor 1) (See page IN–31).
OK
DIAGNOSTICS – ENGINE (1MZ–FE)
YES Go to relevant DTC chart.
OK Go to step 10.
NG Repair or replace harness or connector.
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