DTC P0134 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1): Description

WARNING: This page is about a different variant/trim than selected.

HINT:

Sensor 1 refers to the sensor mounted in front of the Three-Way Catalytic Converter (TWC), located near the engine assembly.
Sensor 2 refers to the sensor mounted behind the TWC, located far from the engine assembly.

DTC TROUBLE DETECTION REFERENCE

DTC No.	DTC Detection Condition	Trouble Area
P0134	With warm engine, Heated Oxygen (HO2) sensor (bank 1 sensor 1) output does not indicate rich (more than 0.45 V) even once when conditions (a), (b), (c), (d) and (e) continue for more than 50 seconds (1 trip detection logic): Engine speed: 900 rpm or more Vehicle speed: 25 mph (40 km/h) or more Throttle valve not fully closed 180 seconds or more after starting engine Engine coolant temperature more than 40°C (104°F)	Open or short in HO2 sensor (bank 1 sensor 1) circuit HO2 sensor (bank 1 sensor 1) HO2 sensor heater (bank 1 sensor 1) EFI relay Air induction system Fuel pressure PCV hose connections PCV valve and hose Injector Gas leakage from exhaust system PCV piping ECM

HINT:

If this DTC is set, check the output voltage of the HO2 sensor (bank 1 sensor 1) by selecting the following menu items on an intelligent tester: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL. If using an OBD II scan tool, refer to the instruction information.