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help with Code: P1131 - Lack of HO2S11 Switch Sensor Indicates Lean

ndjidem

Member
Joined
April 29, 2024
Messages
18
Reaction score
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City, State
Bamako
Year, Model & Trim Level
2006 Eddie Bauer edition
I have an issue with my 02 Explorer with the P1131. I used forscan to reset the code, but after driving a while, it comes back. I have cleaned all 4 oxygen sensors that were not cleaned since. I checked the exhaust for air leaks, but the code is still coming up. I need help now to guide me forward. Below is the complete diagnostic result with forscan
===OBDII DTC P1131-C===
Code: P1131 - Lack of HO2S11 Switch Sensor Indicates Lean

Status (-43):
- Confirmed - malfunction is confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

HO2S11 not switching correctly. Sensor indicates lean.

Air leaks at the exhaust manifold

This DTC may be caused by :

Low fuel pressure.

Manifold vacuum leak.

HO2SHTR11 Heater Circuit Malfunction

===END OBDII DTC P1131-C===
 






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