Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN







IAT sensor not working, any damage on engine?


  Email This Post



mytiguan
New User

Aug 1, 2012, 7:08 AM

Post #1 of 4 (2533 views)
Shortcut
IAT sensor not working, any damage on engine? Sign In

Hello,

The OBD Check Engine indicator lighted up last week on my 2012 Tiguan 2.0, dealer told me the Intake Air Temperature sensor has failed, and part delivery from VW could take 10 days.

I've driven about 50km since the problem first showed up, symptoms are full speed (and very loud) radiator fan and increased fuel consumption. I have not noticed any power loss.

My questions are, does the increased fuel consumption indicate a richer air/fuel ratio? Would driving with a bad IAT sensor damage the engine? This is my new car with only 900km done.

Thank you!


Discretesignals
Veteran / Moderator


Aug 1, 2012, 7:50 AM

Post #2 of 4 (2517 views)
Shortcut
Re: IAT sensor not working, any damage on engine? [In reply to] Sign In

The intake air temperature sensor or IAT is used by the engine control module (ECM) to calculate the temperature of the incoming air into the engine. The ECM uses the air intake temperature to fine tune the amount of fuel going into the engine and ignition timing. The IAT may also be used to keep the ac compressor from engaging if it is too cold outside.

Some IATs are part of the MAF sensor and others may be located separately in the ducting going to the throttle body.

An unplugged IAT won't damage the engine, but may cause increased fuel consumption and various drive-ability problems.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


mytiguan
New User

Aug 1, 2012, 8:04 AM

Post #3 of 4 (2510 views)
Shortcut
Re: IAT sensor not working, any damage on engine? [In reply to] Sign In


In Reply To
The intake air temperature sensor or IAT is used by the engine control module (ECM) to calculate the temperature of the incoming air into the engine. The ECM uses the air intake temperature to fine tune the amount of fuel going into the engine and ignition timing. The IAT may also be used to keep the ac compressor from engaging if it is too cold outside.

Some IATs are part of the MAF sensor and others may be located separately in the ducting going to the throttle body.

An unplugged IAT won't damage the engine, but may cause increased fuel consumption and various drive-ability problems.


Thank you!!! It's relieving to know this issue won't crapout my engine.


nickwarner
Veteran / Moderator


Aug 1, 2012, 9:53 PM

Post #4 of 4 (2465 views)
Shortcut
Re: IAT sensor not working, any damage on engine? [In reply to] Sign In

Thats right, it won't crapout your engine. Its actually doing this to protect it. Your ECM calculates how much fuel to deliver based on readings it gets from its various sensors. If it detects a fault with one of the sensors that it relies upon for data it will go into a conservative mode. While it does give you less power and lower fuel economy, its doing so to protect your engine from damage until it can receive the proper data.




IAT sensor not working, any damage on engine?


  Email This Post
 
 






Latest Forum Post
The tip is out - when I pull on it - it just pulls back in -- Just bought it - t...
I have a 2003 chevy silverado. The right rear running light isn't working. I re...
Glad I found this site - now I just hope that you can help me. The first thing i...
I have a 95 Mazda B2300 extended cab. i know its pretty much the same as a Ford ...
Please, any advice is helpful! First, I drive a 1997 VW Passat with 40K (origin...
I have a 2001 Toyota Camry that keeps blowing the gauge fuse. I have put an engi...

Feed Button


Used Car Search
Used Car Price Ranges:
Under $5,000
$20,000
$35,000

$10,000
$25,000
$40,000
$15,000
$30,000
$45,000
Over $45,000
Search used Cars By Manufacturers:
Used Acura
Used Audi
Used BMW
Used Buick
Used Cadillac
Used Chevrolet
Used Chrysler
Used Dodge
Used FIAT
Used Ford
Used GMC

Used Honda
Used Hyundai
Used Infiniti
Used Jaguar
Used Jeep
Used Kia
Used Land Rover
Used Lexus
Used Lincoln
Used Mazda
Used Mercedes-Benz

Used MINI
Used Mitsubishi
Used Nissan
Used Porsche
Used Saab
Used Scion
Used Subaru
Used Suzuki
Used Toyota
Used Volkswagon
Used Volvo
2010 Honda Civic
$15,770
2004 Jeep
$8,991
2012 Mustang
$22,990
1997 Honda Cr-V
$4,490
2010 Toyota Prius
$17,496
2010 BMW 328
$26,980




Automotive Forum Categories
Automotive Repair
Auto Body Repair and Refinishing
AC Auto Repair Help Forum
Automotive Wiring and Electrical

Auto Insurance and Car Financing
Automotive World
Brake Systems
Car Stereo Repair Advice
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair

Steering and Suspension
Tricks of the Trade
General Discussions
Car Shows and Events
The Bargin Bin
Motor Vehicle Inspection
Car Care Tips
Traffic Ticket Help
Car Racing

Gasoline, Motor Oils, Concept Cars
Remote Control Cars and Vehicles
Truck Repair
Truck Repair Advice


Truck Engine Repair
Truck Suspension Repair
Motorcycle Repair
Motorcycle and ATV Repairs

Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Seat Repair
Car Forum Posts - Sitemap


Search for (options) Privacy