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Old 11-16-2014, 09:37 PM
Don7299 Don7299 is offline
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Default Code P0071

Hey guys, my truck has been setting for several day and really cold here. Started it and it set a P0071 code. IAT sensor rationality....What the heck does this mean? It still run good. Any help out there?
Don7299
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Old 11-17-2014, 08:29 AM
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stodg73 stodg73 is offline
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Thank you for posting!

We need a little more information about your truck, What year, engine size, transmission, 4x4, any modifications, etc.

The P0071 could be the IAT, or a battery sensor problem.

This could be as easy as plugging in the truck overnight, cleaning the IAT sensor with electronic cleaner after taking it out, changing the sensor under the battery or checking all the wiring to both of these sensors.
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Old 11-17-2014, 12:55 PM
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Hi, Don! Welcome!! Your P0071 code may not be much to be concerned about or it may mean a bit of diagnostics. The ECM is seeing something from the IAT that it does not expect to see. The first thing I would do is clear the code and see what happens. It may be a nuisance code. If it does return, then I would suggest you pull the IAT and either clean it (as Stodg73 said) or replace it. If the code comes back again then look at the plug and wiring for issues.
Tom
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Old 11-17-2014, 09:09 PM
Don7299 Don7299 is offline
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Default Code P0071

Hey, thanks guys for responding. I have a 2006 Dodge 3500 Megacab with the 5.9 HO Cummings and 6 speed standard tranny. Love the truck and does a great job pulling my 42' 5th wheel. After a little more research, I also think it might be just need to clean it or the connections. It was colder than what I wanted to be out doing today, so it is still just sitting there. I will look at it tomorrow, and as you suggested reset it and see if it comes back, but might pull the IAT sensor off and check it anyway. Let me know if you need any more information or have any other ideas.
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Old 11-18-2014, 11:17 AM
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Just let us know what you find.
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Duct Tape can't fix stupid, BUT it can muffle the sound
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Old 11-23-2014, 04:06 PM
Don7299 Don7299 is offline
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Default Code P0071

Hey guys, sorry taking so long getting back....I did get it fixed, turned out to be a dirty IAT sensor. Cleaned it and everything is better.....Thanks for the help.

Don
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Old 11-23-2014, 04:16 PM
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Thanks for letting us know what you found. I am also glad it turned out to be something simple and cheap to fix!
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1996 RAM "Custom Ground" 100 plate 3/4 forward, 300 injectors, 16.5 timing, Goerends Auto = 365HP, 833TQ Third Gen Rims, Aluminum Headache Rack
Duct Tape can't fix stupid, BUT it can muffle the sound
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Old 11-23-2014, 04:27 PM
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stodg73 stodg73 is offline
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Glad that you got it fixed.

Thanks for letting us know what it was.
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O.O., 01.5, Dodge, 2500, High Output (H.O.) Cummins Turbo Diesel (245/505), Quad Cab Long Bed (QCLB), 4x4, Sport, Original Bosch VP 44 Injection Pump, 6 Speed/NV5600 Transmission, 3.55 Gears, 105k, currently stock engine, Fram Air Filter, 285/75R16s, Glow Shift Gauges: Fuel Pressure (FP), Boost, Exhaust Gas Temperature (EGT), Oil Temperature, SMARTY@1, Airtex lift pump 19 psi @ idle, 14 psi @ WOT, Propane Injection, 2 Stroke Oil, Intake Air Temperature (IAT) Fooler = Better MPG, Bed Lined, Chrome Nerf Bars, more to come!!

Toys:
'79 CJ5, 258ci, 3" lift, 33x12.50x15, Stock Engine and 3 Speed Tranny
'05 Suzuki, GSX1300R, Hayabusa, All Stock, #3('00 blown engine, '00 stolen, & '05)
The complete live & learn and pass it on by H. Jackson Brown, Jr.
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