[MatF36mods]

Wondering if anyone can help with the following errors. I installed and CTS Intake and charge pipe. I didn't get any check engine lights and the car feels like it runs great. Last weekend I ran a diagnostic on the ODB2 port preparing to go to a stage 1 map and I ran into the following error codes:

108001 - Diagnosis monitors the upper voltage limit of the intake air temperature sensor after air filter.
Malfunction monitoring conditions
The fault is detected whenever the voltage of intake air temperature sensor is greater than 5V.

102a01 - The diagnosis monitors whether a signal from the HFM airflow sensor is present.
Malfunction monitoring conditions
The fault is detected whenever the period duration of the HFM signal is zero.

108010 - Diagnosis monitors the voltage of the intake air temperature sensor after air filter in terms of impermissible large surges.
Malfunction monitoring conditions
The fault is detected whenever the difference between the raw voltage value and the low-pass filtered voltage value is greater than 1 V.

I thought most of the errors were due to the MAF sensor, so I properly cleaned it out with an MAF cleaning spray. Before I change the MAF sensor out for $170, does anyone else have any recommendations? Are these fault codes normal due to the CTS Intake install and increased air flow? Any suggestions or advice would be grateful. Thanks

[TerryGTX]

Originally Posted by MatF36mods

Wondering if anyone can help with the following errors. I installed and CTS Intake and charge pipe. I didn't get any check engine lights and the car feels like it runs great. Last weekend I ran a diagnostic on the ODB2 port preparing to go to a stage 1 map and I ran into the following error codes:

108001 - Diagnosis monitors the upper voltage limit of the intake air temperature sensor after air filter.
Malfunction monitoring conditions
The fault is detected whenever the voltage of intake air temperature sensor is greater than 5V.

102a01 - The diagnosis monitors whether a signal from the HFM airflow sensor is present.
Malfunction monitoring conditions
The fault is detected whenever the period duration of the HFM signal is zero.

108010 - Diagnosis monitors the voltage of the intake air temperature sensor after air filter in terms of impermissible large surges.
Malfunction monitoring conditions
The fault is detected whenever the difference between the raw voltage value and the low-pass filtered voltage value is greater than 1 V.

I thought most of the errors were due to the MAF sensor, so I properly cleaned it out with an MAF cleaning spray. Before I change the MAF sensor out for $170, does anyone else have any recommendations? Are these fault codes normal due to the CTS Intake install and increased air flow? Any suggestions or advice would be grateful. Thanks

have you resolved this issue'? my MAF caused fuel trim issue. I unplugged it and fuel trim went to normal. waiting for a new maf sensor to put on tomorrow

[Jhouse_01]

I had CTS intakes on a stock bmw m4 and I never had any issues, now I have vrsf downpipes and CTs intakes and stage 2 bm3 tune and I got the same code 102A01 I’m not sure if it’s my MAF sensor but when it was stock it was fine

[n55david]

Originally Posted by Jhouse_01

I had CTS intakes on a stock bmw m4 and I never had any issues, now I have vrsf downpipes and CTs intakes and stage 2 bm3 tune and I got the same code 102A01 I’m not sure if it’s my MAF sensor but when it was stock it was fine

Would be a good question for the s55 guys in the m3/m4 forums.