P1135 AUDI – HO2S Heater Circuit – Electrical Malfunction Sensor 2 Banks 1 and 2

P1135 AUDI Possible Causes

• Faulty O2 sensor
• O2 sensor harness is open or shorted
• Poor electrical connection in the O2 sensor circuit

How to fix P1135 AUDI code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Check engine light on (or service engine soon warning light)

P1135 AUDI Meaning

A heated exhaust gas oxygen sensor (HO2S) indicating rich at the end of a test attempts to correct a too lean condition. The test fails when the fuel control system no longer detects switching for a calibrated duration.