Question

Freeze Frame Data Interpretation

Trying to discover any clues of my car issue in the freeze frame data. I don't know how to int erupt the data.

DTCFRZF P0171 Chevy Malibu 2010 LS 2.4L (B) 137,000 FUELSYS1 CL FUELSYS2 N/A LOAD_PCT (%) 25.5 APP_D (%) 17.6 APP_E (%) 8.6 TAC_PCT (%) 7.1 EQ_RAT 0.999 TP_R (%) 4.7 ATT (F) 75 TP_B (%) 18.8 BARO (inHg) 28.6 CATEMP11 (F) 1252.40 VPWR (V) 14.855 LOAD_ABS (%) 25.8 FLI (%) 55.3 WARM_UPS 1 CLR_DIST (mile) 7 EVAP_VP (inH20) 0.084 MAF (1b/min) 10.6 TP (%) 18.4 RUNTM (sec) 110 EVAP_PCT (%) 10.6 RPM (/min) 709 VSS (mph) 0 SPARKADV (*) 4 IAT (*F) 100 ETC (*F) 180 SHRTFT1 (%) 12.5 LONGFT1 (%) 29.7 MAP (inHg) 12.1

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Clarification Request
Just a note about data like this.

When I'm working a problem, I have to know what problem I'm working to connect the problem to a data dump. A data dump alone may not tell much. Tell the forum what is "my car issue".

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Answer
P0171

Hi, Mgpotter; P0171 is caused by a lean condition. There are sooooo many things that can cause this.
Vacuum leaks, plugged injector(s), plugged fuel filter, O2 or MAP sensors, ect… The list goes on and on.
One of the FF data sticks out at me: 18.8BARO. Normal barometric pressure, at sea level, is about 30.0.
I'd have to do some research, but I think that the MAP/BARO sensors are integrated with the MAF sensor. You can easily try cleaning the MAF sensor 'filament' with cleaner available at most part stores. Usually, if you unplug the MAF sensor when the engine is running, the engine will 'smooth out', but will also set another trouble code. And, as Robert asked, give us more detailed symptoms of your issue.

Good luck.
Loren

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