I had some repair work done on the intake manifold of my 2000 Avalon with 125K miles. There was some oil leak from there. Now 1 week later the CEL comes on with codes P1135 and P1155. Figured that was Bank 2 Sensor 1 (front of engine exhaust manifold ) and Bank 1 Sensor 1 (rear engine exhaust manifold ) A/F sensor heaters going bad. Both heater circuit resistance was too high. Had them replaced by the local mechanic with OEM equiv. Denso 234-9021. Denso makes the actual Toyota sensors (with the Toyota labels).
After an hour the CEL is back with same P1135 and P1155. Mechanic says resistance is within range on both sensors. However he checked the wiring and the A/F Sensor Heater Relay and he is seeing +1 V higher. All fuses are OK. Wondering what to do now. Should I replace the Denso ones with the Toyota branded ones? Could the ECU be bad?
Thursday, September 29th, 2011 AT 12:37 AM