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Discussion Starter · #1 ·
my service engine light went on my 2001 vw jetta TDI, put my OBDII computer on it, it read P1156 IAT sensor short to ground was displayed, where is this sensor located? is it the map sensor or something else?

Premium Member
9,239 Posts
Welcome to the forum. welcometomyturbodies

Just a tip on P1156 error code.

VAG Error Code: 17564

EOBD II Error Code: P1156

Fault Location:
Manifold absolute pressure (MAP) sensor (G71) - open circuit/short to earth

Possible Cause:
Wiring open circuit/short to earth.
Manifold absolute pressure (MAP) sensor (G71).

As taken from my http://www.myturbodiesel.com/forum/f9/free-eobd-ii-error-codes-software-2919/index2.html

Probably not related.
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