Toyota echo PO135

Answer 1

Heated Oxygen Sensor Heater Circuit Malfunction (Bank1 Sensor1)

* DTC Detecting Condition # When the heater operates, heater current exceeds 2 A

(2 trip detection logic) # Heater current of 0.2 A or less when the heater operates

(2 trip detection logic) * Trouble Area # Open or short in heater circuit of heated oxygen sensor # Heated oxygen sensor heater # ECM HINT:

* Bank 1 refers to the bank that includes cylinder No.1. * Sensor 1 refers to the sensor closer to the engine body. * Sensor 2 refers to the sensor farther away from the engine body. INSPECTION PROCEDURE

HINT:

Read freeze frame data using Toyota hand-held tester or OBD II scan tool. Because freeze frame records the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc. at the time of the malfunction.