flash ecu with gm maf

[3kgt_tt]

so i got my car tuned and it works really good, my tuner was scared of the combination of the maft t with gm maf so he only tuned me at 18psi with e85. i want to go higher the only thing we cant figure out is that we keep getting code 24 (barometric pressure sensor) on evo scan. i replaced the gm maf with a new one and still keeps coming back. i check for 12 volts on the connector and its good. any ideas? should i just switch to evo maf?

[3kgt_tt]

i meant code 25 not 24

[futurevr4man]

I would like to see pics, but if I'm not mistaken, the GM maf's don't come with baro sensors in them. Someone please correct me if I'm wrong.

[sketch]

I would like to see pics, but if I'm not mistaken, the GM maf's don't come with baro sensors in them. Someone please correct me if I'm wrong.

i reckon this is correct

[Greg E]

The MAFT is supposed to send the ECU a baro signal.

[Toni]

Yup, sounds like something is miswired. Check the maft manual.


(pasted from the latest, your version may differ)
Pink - +12
Green – Translator frequency signal
Black – Ground (0 volts)
Brown – ATS (Air temperature signal, fixed at 80 degrees)
Gray – BARO (Barometric pressure signal, fixed at 3.9 volts)
White – RPM signal, connected to CAS sensor.

[futurevr4man]

Yeah, a constant signal. That's right. I couldn't remember.

[notimaginative]

Sorry to bring this back from the dead, but was this ever resolved. I'm having a barometer malfunction code and the check engine light keeps coming on. Evo scan shows a constant signal from the translator for both air temp and baro signal. I'm running a jesters and a gen 2 translator with a gm 3"

[futurevr4man]

Can you just go into the peripheries and turn off the fault?

[notimaginative]

I don't think it's that simple. The periphery only disables the CEL. I believe the error is causing the trims to not fuction. I have everything else working but it won't adjust the trims. I have very few peripherys selected anyway because I'm full vacuum reduction, no EGR, no ABS, no AC, and no cruise control. What periphery would I check for a " barometer circuit malfunction code 105" in ecuflash? I'm using evoscan to report the DTC. I am up-to-date with 2.9 as well. Again, evoscan is showing constant reading for all my logs.