p1123 and p1125 99 boxster replaced maf

[aerogianni]

I have a 99 boxster got the 1123 and 1125 codes, from the research i figured i needed a new maf. i replaced the maf and got the same codes after about 3 drive cycles. i really need help i dont know what else to check next. the bellows looked good i checked it today and also have looked for anything obvious

Edited May 13, 2009 by aerogianni

[Loren]

I have a 99 boxster got the 1123 and 1125 codes, from the research i figured i needed a new maf. i replaced the maf and got the same codes after about 3 drive cycles. i really need help i dont know what else to check next. the bellows looked good i checked it today and also have looked for anything obvious

:welcome:

P1123 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Lean Threshold

P1125 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold

This says that the DME thinks your mixture is too rich - and can make it lean enough.

Potential causes are:

- Fuel pressure too high.

- Fuel injector leaking.

- EVAP canister purge valve open.

Make sure the MAF is functioning properly by reading the air flow at idle and at 2500 RPM no load (you will need Durametric software, a PST2 or PIWIS tester to do this).

Scan for more codes - It could be a stuck EVAP purge valve.

[aerogianni]

I have a 99 boxster got the 1123 and 1125 codes, from the research i figured i needed a new maf. i replaced the maf and got the same codes after about 3 drive cycles. i really need help i dont know what else to check next. the bellows looked good i checked it today and also have looked for anything obvious

:welcome:

P1123 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Lean Threshold

P1125 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold

This says that the DME thinks your mixture is too rich - and can make it lean enough.

Potential causes are:

- Fuel pressure too high.

- Fuel injector leaking.

- EVAP canister purge valve open.

Make sure the MAF is functioning properly by reading the air flow at idle and at 2500 RPM no load (you will need Durametric software, a PST2 or PIWIS tester to do this).

Scan for more codes - It could be a stuck EVAP purge valve.

my scanners will not give me much information, i really doubt an injector problem on both banks, how could i determine a stuck evap valve

[Topless]

I have a 99 boxster got the 1123 and 1125 codes, from the research i figured i needed a new maf. i replaced the maf and got the same codes after about 3 drive cycles. i really need help i dont know what else to check next. the bellows looked good i checked it today and also have looked for anything obvious

:welcome:

P1123 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Lean Threshold

P1125 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold

This says that the DME thinks your mixture is too rich - and can make it lean enough.

Potential causes are:

- Fuel pressure too high.

- Fuel injector leaking.

- EVAP canister purge valve open.

Make sure the MAF is functioning properly by reading the air flow at idle and at 2500 RPM no load (you will need Durametric software, a PST2 or PIWIS tester to do this).

Scan for more codes - It could be a stuck EVAP purge valve.

my scanners will not give me much information, i really doubt an injector problem on both banks, how could i determine a stuck evap valve

Check for additional error codes. If you have evap issues you should get codes.