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I have a 2001, 2.0 and got two codes when the check engine light came on, P0113 and P0103. These read as IAT sensor And MAF sensor. However, I went to ECS Tuning to purchase a new IAT and their website states that this sensor does not go to my model. We have replaced The MAF a little less than a year ago although, I have read on some forums that this sensor is known to fail a lot. Any advice! Should I replace the MAF again? How do I know if my car takes the IAT?
 

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http://wiki.ross-tech.com/wiki/index.php/16497/P0113/000275

http://wiki.ross-tech.com/wiki/index.php/16487/P0103/000259

The iat sensor, is integrated into the maf assembly; so, that is why you are getting BOTH iat/maf trouble codes, at the same time (they are separate on the 1.8T).

What brand replacement maf; did you buy and install on the car (only genuine oem Bosch mafs are recommended)? Why did you replace the original maf to begin with; do you still have the original maf? Cheaper aftermarket mafs, cannot read things as accurately (bosch uses a patented thin film sensor), cause drivability problems and are known to prematurely fail.

I would begin, by reading the live data on the maf sensor and see if it is spec, while wiggling the plug/connector, to see if the signal drops in/out. What scan tool, do you have access to and can you read live data with it?

Give us some history of the car, info on the maf; what scan tool you have and we can go from there. Thanks.
 
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