P1135 Isuzu HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Electrical Malfunction

P1135 Isuzu HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Electrical Malfunction

Possible causes
– Faulty O2 Sensor
– O2 Sensor harness is open or shorted
– O2 Sensor circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1135 Isuzu Description

A Heated Exhaust Oxygen (HO2S) sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

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