OBD II Fault Code P0131 :

Description of Fault code P0131

A/F SENSOR 1 CIRCUIT LOW VOLTAGE

Possible failuer P0131

• A/F sensor circuit harness signal line short to ground.

Diagnostic Procedure using AutoHex II Scan Tool

• Specific IC for A/F sensor detect ground short during 2 seconds.

Test Conditions using AutoHex tester

• Engine running.
• BATTERY voltage ≥ 10.7V

Clear Fault codes Conditions

• Specific IC for A/F sensor detect ground short during 2 seconds.

MIL Status

• Check Engine Light ON

Note:

• AutoHex II is a professional Auto diagnostic.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex II

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