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TuningBot DTC Database · v4.37.14

P0134 O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEmissionsOBD2

What P0134 means

P0134
O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1 Generic · emissions Data confidence 90%

The control module detected no activity on the O2 Sensor where a changing signal was expected.

Symptoms

  • MIL illuminated
  • Possible increased fuel consumption
  • Possible unstable idle

Possible causes

  • Wiring open circuit
  • heating inoperative
  • H025

Recommended checks

  • Read live sensor voltage/current and heater status
  • Inspect wiring and connectors
  • Check for exhaust leaks near the sensor
  • Check fuel trim values for upstream mixture faults

Related and nearby codes

How to read P0134

P

Powertrain: engine, transmission and driveline systems.

0

Generic SAE-standard code: same meaning on every make.

134

Specific fault index within the subsystem.

Frequently asked questions about P0134

What does P0134 mean?

O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1. The control module detected no activity on the O2 Sensor where a changing signal was expected.

Is P0134 generic or manufacturer-specific?

P0134 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P0134 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

ECU tuningDyno-tested results by model and engine See the results →

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