 Help code 71? |
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 Aug 5, 2009 - 1:41 PM
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Enthusiast  Joined Jan 17, '06 From Wisconsin Currently Offline Reputation: 0 (0%)  |
Hi guys the other day my check engine light came on then it happened the next day, also both times it went back off in a few minutes but now I have a code 71 for EGR system in my computer. Both times when it happened the car ran the same. So I am not too concerned but I am trying to tune up the motor and am concerned as to what sensors this could be identifying as bad or what it means???? This isn't for the o2 sensor correct I believe that code is a 27? Could it just be a dirty throttle body? What exactly does the EGR system include? Any thoughts.....Thanks guys......
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Aug 5, 2009 - 1:44 PM
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Enthusiast Joined Jan 17, '06 From Wisconsin Currently Offline Reputation: 0 (0%) |
Also I have a wideband innovate AFR gauge hooked up and my afr range is 14.1 to 14.9 at cruise 3,000 rpm 60mph. Now I can't find anywhere if it is normal for the AFR to fluctuate that much at cruise? It also fluctuates at idle 14.4 to 14.8 I am guessing it is normal. Anyone have any professional tuning experience? Thanks again......
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Aug 6, 2009 - 12:24 PM
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 Enthusiast Joined Mar 22, '07 From Houston, TX Currently Offline Reputation: 4 (100%) |
code 71 is egr gas temp too low. now that could mean the egr system is faulty, or the egr temp sensor is bad.
-------------------- QUOTE "And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH 1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED 1995 ST: SOLD @273k miles, Auto, all power, CarPC, White 1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810 1994 Lexus LS400: This is my new DD |
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Aug 6, 2009 - 1:36 PM
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Enthusiast Joined Jan 17, '06 From Wisconsin Currently Offline Reputation: 0 (0%) |
Thanks for the reply, I wonder how the gas temp could become too low??? Probably a faulty sensor?????
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Aug 7, 2009 - 1:42 PM
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Enthusiast Joined Mar 22, '07 From Houston, TX Currently Offline Reputation: 4 (100%) |
its probably the sensor. or a blockage in the egr tube, or a faulty egr valve - in order of probability.
-------------------- QUOTE "And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH 1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED 1995 ST: SOLD @273k miles, Auto, all power, CarPC, White 1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810 1994 Lexus LS400: This is my new DD |
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Aug 7, 2009 - 2:05 PM
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 Enthusiast Joined Dec 19, '07 From tx Currently Offline Reputation: 22 (100%) |
That amount of fluctuation in your AFR's is perfectly normal BTW
--------------------  ENGINE: '93 RC 3S-GTE/WRC CT-20b [18-20PSI] PERF: TRD/HKS/ARP/NGK/MSD/ACT/Blitz/STRI/APEX'i/TwosRus/GReddy/Magnaflo/KOYO SUSP: Tein/Bilstein/SusTech/ INT: SS-III SEATS/Toyota Hyper Sports EXT: WRC/TRD/404 QUOTE (lagos @ Aug 25, 2010 - 10:13 AM)  Its a safety feature so that people like you don't end up killing themselves or everyone around them. Slow down Paul Walker. 6GC Chat - Go there: [url="http://www.griffgirl.com/forum/chat/index.php[/url] |
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Aug 7, 2009 - 5:48 PM
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Enthusiast Joined Jan 17, '06 From Wisconsin Currently Offline Reputation: 0 (0%) |
Thanks for all the responses when I get some free time I'll have to try and clean out the egr system. I thought AFR was probably o.k. but I wanted to be sure so thanks......
Brandon |
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