got code p0171 little help needed - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum

saint6 · 10-25-2012, 05:21 PM

did some searching and most people end up with cracked vac lines or cracked pcv hose has anyone had a cracked oil seperator on the 2.3l thinking about buying it along with the pcv valve and hose

have to remove the intake to find the vac leak and decided to just replace this stuff when its off.

saint6 · 10-25-2012, 06:14 PM

did the carb cleaner test and seems the leak is coming from behind the intake manifold.

saint6 · 11-04-2012, 11:44 PM

ended up pulling the intake manifold to replace the cracked pcv hose and install new pcv hose

saint6 · 11-04-2012, 11:49 PM

only problem is that i am still getting p0171 code car is completely stock any ideas on things to try was also getting p0421 before hose and pcv replacement but p0421 has not showed back up yet.

saint6 · 11-05-2012, 02:51 PM

anybody

austinairport · 11-05-2012, 10:21 PM

Have you reset the ECU since? How many drives cycles since you replaced the PCV hose?

Sometimes, it will take the ECU a bit of time to adjust.

saint6 · 11-06-2012, 09:49 PM

reset the ecu yesterday to clean maf p0171 came back today.

what can cause p0171 if i have no vacuum leaks or intake?

austinairport · 11-07-2012, 01:09 AM

The workshop manual doesn't even list that code as a fault code for the L3 engine.

But for the AJ (the V6) it says it's a fuel related issue. Too lean to be precise.

Are you experiencing any symptoms? Do you have access to your own code reader? I would clear it out and see if it pops back up again.

saint6 · 11-07-2012, 09:10 AM

yes i have a code reader that's how i got the code i was getting both p0421 p0171 untill i fixed the pcv hose now i am only getting p0171.

cleared the p0171 twice came back both times no symptoms really besides reduced mileage and car runs smooth.

saint6 · 11-07-2012, 05:28 PM

well both codes are still coming up p0421,p0171 guess fixing the pcv did nothing but fix a vac leak

10-25-2012, 05:21 PM	#1 (permalink)
saint6 Registered User Join Date: May 2012 Location: Buffalo,ny Posts: 90 Thanks: 2 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) iTrader: 0 reviews	got code p0171 little help needed did some searching and most people end up with cracked vac lines or cracked pcv hose has anyone had a cracked oil seperator on the 2.3l thinking about buying it along with the pcv valve and hose have to remove the intake to find the vac leak and decided to just replace this stuff when its off. __________________ 2005 mazda 6i 4spd atx

10-25-2012, 06:14 PM	#2 (permalink)
saint6 Registered User Join Date: May 2012 Location: Buffalo,ny Posts: 90 Thanks: 2 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) iTrader: 0 reviews	did the carb cleaner test and seems the leak is coming from behind the intake manifold. __________________ 2005 mazda 6i 4spd atx

11-04-2012, 11:44 PM	#3 (permalink)
saint6 Registered User Join Date: May 2012 Location: Buffalo,ny Posts: 90 Thanks: 2 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) iTrader: 0 reviews	ended up pulling the intake manifold to replace the cracked pcv hose and install new pcv hose __________________ 2005 mazda 6i 4spd atx

11-04-2012, 11:49 PM	#4 (permalink)
saint6 Registered User Join Date: May 2012 Location: Buffalo,ny Posts: 90 Thanks: 2 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) iTrader: 0 reviews	only problem is that i am still getting p0171 code car is completely stock any ideas on things to try was also getting p0421 before hose and pcv replacement but p0421 has not showed back up yet. __________________ 2005 mazda 6i 4spd atx

11-05-2012, 02:51 PM	#5 (permalink)
saint6 Registered User Join Date: May 2012 Location: Buffalo,ny Posts: 90 Thanks: 2 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) iTrader: 0 reviews	anybody __________________ 2005 mazda 6i 4spd atx

11-05-2012, 10:21 PM	#6 (permalink)
austinairport Registered User Join Date: Feb 2010 Location: CenTex Posts: 455 Thanks: 21 Thanked 53 Times in 45 Posts Groans: 42 Groaned at 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 4 Post(s) iTrader: 0 reviews	Have you reset the ECU since? How many drives cycles since you replaced the PCV hose? Sometimes, it will take the ECU a bit of time to adjust. __________________ 2004 Mazda 6i ATX -Ksport - Magnaflow - Motegi -

11-06-2012, 09:49 PM	#7 (permalink)
saint6 Registered User Join Date: May 2012 Location: Buffalo,ny Posts: 90 Thanks: 2 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) iTrader: 0 reviews	reset the ecu yesterday to clean maf p0171 came back today. what can cause p0171 if i have no vacuum leaks or intake? __________________ 2005 mazda 6i 4spd atx

11-07-2012, 01:09 AM	#8 (permalink)
austinairport Registered User Join Date: Feb 2010 Location: CenTex Posts: 455 Thanks: 21 Thanked 53 Times in 45 Posts Groans: 42 Groaned at 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 4 Post(s) iTrader: 0 reviews	The workshop manual doesn't even list that code as a fault code for the L3 engine. But for the AJ (the V6) it says it's a fuel related issue. Too lean to be precise. Are you experiencing any symptoms? Do you have access to your own code reader? I would clear it out and see if it pops back up again. __________________ 2004 Mazda 6i ATX -Ksport - Magnaflow - Motegi -

11-07-2012, 09:10 AM	#9 (permalink)
saint6 Registered User Join Date: May 2012 Location: Buffalo,ny Posts: 90 Thanks: 2 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) iTrader: 0 reviews	yes i have a code reader that's how i got the code i was getting both p0421 p0171 untill i fixed the pcv hose now i am only getting p0171. cleared the p0171 twice came back both times no symptoms really besides reduced mileage and car runs smooth. __________________ 2005 mazda 6i 4spd atx

11-07-2012, 05:28 PM	#10 (permalink)
saint6 Registered User Join Date: May 2012 Location: Buffalo,ny Posts: 90 Thanks: 2 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) iTrader: 0 reviews	well both codes are still coming up p0421,p0171 guess fixing the pcv did nothing but fix a vac leak __________________ 2005 mazda 6i 4spd atx

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