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P0157

Overview

Code

P0157

Code Type

P

Code Class

P0

System

Engine, Emissions

Severity Level

Low

Emissions Related

true

Drivability Impact

None

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0157 indicates low voltage in the oxygen sensor circuit for Bank 2 Sensor 2

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

Low downstream O2 voltage affects catalytic converter efficiency monitoring

Possible Causes

Faulty oxygen sensor; Exhaust leaks; Wiring short to ground

Diagnostic Steps

1 Confirm the code; 2 Inspect wiring and exhaust system; 3 Monitor O2 voltage; 4 Replace the oxygen sensor if required

Drive Safety Notes

Driving is safe, but emissions readiness may be delayed

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