Circuit Description

WARNING: This page is about a different car, the 2003 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

For circuit description, see DTC P2195, DTC P2196, DTC P2237, DTC P2238, DTC P2239, DTC P2251, DTC P2252 & DTC P2253 .

Detecting condition of DTC is when after the engine is warmed up, air-fuel ratio (A/F) sensor output (output value changes at the inside of the ECM only) does not change when the following conditions continue for at least 1.5 minutes:

Engine speed is 1500 RPM or more.
Vehicle speed is 25-62 mph (40-100 km/h).

NOTE:

After confirming DTC P0134, use the hand-held tester or OBD II scan tool to confirm voltage output of the A/F sensor (bank No. 1 sensor No. 1) from the CURRENT DATA.
The ECM controls the voltage of the AF1A+ and AF1A- terminals of the ECM to the fixed voltage. Therefore, it is impossible to confirm the A/F sensor output voltage without the hand-held tester or OBD II scan tool.
OBD II scan tool (excluding hand-held tester) displays the 1/5 of the A/F sensor output voltage which is displayed on the hand-held tester.