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P0134

Overview

Code

P0134

Code Type

P

Code Class

P0

System

Engine, Emissions

Severity Level

Medium

Emissions Related

true

Drivability Impact

Minor

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0134 indicates no activity detected in the oxygen sensor circuit for Bank 1 Sensor 1

Symptoms

Check Engine Light illuminated; Poor fuel economy; Rough idle

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Lack of O2 sensor activity prevents proper fuel mixture adjustment

Possible Causes

Failed oxygen sensor; Open circuit in wiring; Exhaust system issues

Diagnostic Steps

1 Confirm the code; 2 Inspect wiring for open circuits; 3 Monitor O2 sensor activity; 4 Replace the oxygen sensor if inactive

Drive Safety Notes

Driving is possible but may cause increased emissions and poor performance

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