P1131 Diagnostic Trouble Code Discussion for April 2009
Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean
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| Help Request | Posted | |
| 1998 Mazda 626 LX 2.5L MIL Lamp on VIN: 1YVGF22D1W P1131: Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean. ... service code keeps coming back.before asking for assistance from this great group,i made sure i didnt have any intake leaks or hoses cracked.no leaks found with smoke machine.so,i figured the upstream sensors must just be lazy after 140,000 miles.installed... |
April 03, 2009 |
