P1123,1125 errors

[Marks996]

Hi Guys,

Anyone successfuly resolve P1123,1125 errors causing check engine light? After having the Timing tensioner replaced and ECU repaired as dealer fixed a P1321 error, the codes cleared and CEL was clear for around 150km. Now they're back and I'm not feeling too confident in the dealer now.

OBD2 stats below. I have no clue what these might help point to but hoping someone on here might! Cheers, Mark

=== Stored Error Code(s) ===
Error Code: P1123
Possible Causes:

Error Code: P1125
Possible Causes:

Freeze Frame Information:
1. DTC for which Freeze Frame was Stored - P1123.
2. Fuel System 1 Status - Closed Loop.
3. Fuel System 2 Status - Closed Loop.
4. Calculated LOAD Value - 2.35 %.
5. Engine Coolant Temp - 190.40 °F.
6. Short Term Fuel Trim - Bank 1 - -7.03 %.
7. Long Term Fuel Trim - Bank 1 - 9.38 %.
8. Short Term Fuel Trim - Bank 2 - -10.94 %.
9. Long Term Fuel Trim - Bank 2 - 8.59 %.
10. Engine RPM - 709.00 Rpm.
11. Vehicle Speed Sensor - 0.00 Mph.

[C2951]

The P1123 and P1125 code pairs usually indicate a failing MAF sensor. You can try clearing the code and cleaning the sensor with some of the CRC sensor cleaner spray (silver can, available in most parts stores) but the sensors have what seems like a fairly high failure rate and you will probably end up replacing it eventually.

When this happened to me, clearing the codes and cleaning the sensor would keep the check engine light off for a few thousand miles and then one or both of the codes would return. I did notice a big improvement in the way the car idled and responded to the throttle once I finally replaced the sensor.

[nphra]

Originally Posted by C2951

The P1123 and P1125 code pairs usually indicate a failing MAF sensor. You can try clearing the code and cleaning the sensor with some of the CRC sensor cleaner spray (silver can, available in most parts stores) but the sensors have what seems like a fairly high failure rate and you will probably end up replacing it eventually.

When this happened to me, clearing the codes and cleaning the sensor would keep the check engine light off for a few thousand miles and then one or both of the codes would return. I did notice a big improvement in the way the car idled and responded to the throttle once I finally replaced the sensor.

Hellp C2951,
Where can i locate the MAF in 1999 911 carrera?
Please help.

Thanks

[FPB111]

Unplug the sensor (Item 3 is the sensor). Remove the two T20 security Torx screws (Item 4). Replace the sensor and tighten screws. Plug electrical connection back in.