Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
CEL IAT Sensor 2005 VW New Beetle 1.8L turbo 5 speed trans
a DTC , PO 113 and PO 098 New OEM IAT sensor from VW, ,newer OEM ECM from VW. New wiring from ECM to IAT sensor. Scan IAT temp is always -40 degrees, jump signal to ground wire at sensor connector temp changes to +280 degrees. Signal wire has 4.7 volts KOEO at sensor and at ECM . IAT sensor grounded direct to battery ground No drivability issues .No other DTCs I need help or suggestions, Please
sure sounds like a defective iat sensor. youve already proved the wiring and pcm arent the issue by jumping the terminals. try putting a resistor inplace of the sensor?
A two wires sensor --- the two wires are live(which is also the signal) and ground ---- the problem is either an open in in the ground side. or an open sensor itself
(1) Substitute a resistor of about 1000 ohm for the sensor then look at the temperature reading if the wiring and ecu are okay it should read somewhere in the normal range.
(2) If it is you have a defective sensor
(3) If it isn't ground the ground side wire from the resistor directly to the cylinder block --- this should give a temperature reading somewhere in the normal engine running range,
(4) If this works remove the resistor and reconnect to the sensor but leave the jumper to ground connected and it should work normally.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
Topic Author
