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ODB2 Codes for P0171


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mgpotter
New User

Jun 7, 2018, 9:48 AM

Post #1 of 3 (181 views)
ODB2 Codes for P0171 Sign In

Need some help figuring out these codes to see if they help find the issue.

DTCFRZF P0171 Chevy Malibu 2010 LS 2.4L (B) 137,000 miles 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


tdigreg
User

Jun 7, 2018, 10:01 AM

Post #2 of 3 (175 views)
Re: ODB2 Codes for P0171 Sign In

What are the symptoms? Just a quick search of that code show that most often a MAF fixed the problem. No guaranties.
Check your fuel pressure should maintain 50-60psi. at all loads. You can rent testers from most auto parts stores. You could try some injector cleaner in your fuel as well.


(This post was edited by tdigreg on Jun 7, 2018, 10:34 AM)


Discretesignals
Ultimate Carjunky / Moderator
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Jun 7, 2018, 10:47 AM

Post #3 of 3 (156 views)
Re: ODB2 Codes for P0171 Sign In

If fuel trims improve at higher engines speed, look for vacuum leaks also.





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