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P0154

Overview

Code

P0154

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 P0154 indicates no activity detected in the oxygen sensor circuit for Bank 2 Sensor 1

Symptoms

Check Engine Light illuminated

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

Inactive upstream O2 sensor prevents proper fuel control

Possible Causes

Failed oxygen sensor; Open circuit in wiring

Diagnostic Steps

1 Confirm the fault code; 2 Inspect wiring and connectors; 3 Monitor sensor activity; 4 Replace the oxygen sensor if inactive

Drive Safety Notes

Driving is possible but emissions and performance may suffer

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