1997 Ford Taurus service engine light

Tiny
GEEWHIZ105
  • MEMBER
  • 1997 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 138,854 MILES
I have a 1997 ford taurus the service engine light came on I found out the light came on due to the intake air temperature sensor I change the sensor and was told to drive 35 to 100miles I drove the 300miles the light remains on what should I do
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Saturday, February 7th, 2009 AT 7:58 AM

5 Replies

Tiny
BMRFIXIT
  • EXPERT
Did you reset the PCM after replacing the sensor
if you didn't you need to do so
disconnect the battery
if the light returned then need the codes
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Sunday, February 8th, 2009 AT 7:43 AM
Tiny
GEEWHIZ105
  • MEMBER
I first change the IAT sensor disconnect battery drove the car the service engine light came back on within 44miles of driving I had the service light checked samething IAT sensor low input
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Sunday, February 8th, 2009 AT 7:51 PM
Tiny
BMRFIXIT
  • EXPERT
What do u have for code # (P0000)
after resetting
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Monday, February 9th, 2009 AT 6:23 AM
Tiny
GEEWHIZ105
  • MEMBER
The code P0112 was found
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Monday, February 9th, 2009 AT 11:32 PM
Tiny
BMRFIXIT
  • EXPERT
I would suspect bad wire and or ground
check the connector plug and wiring harness
this is the test steps for the code you provided

P0112 (IAT) indicates sensor signal is less than self-test minimum. Minimum signal for IAT and ECT sensor is 0.2 volt. Possible causes for this fault are:
* Circuit grounded in wiring harness.
* Faulty sensor.
* Faulty connection.
* Faulty PCM.

Turn ignition off.
Disconnect wiring harness connector from suspect sensor.
Check for damaged wiring, and repair as necessary.
With scan tester connected, turn ignition on. Using scan tester, access ECT V of IAT V PID. If PID is less than 4.2 volts, go to next step. If PID is 4.2 volts or more,
replace sensor and repeat QUICK TEST.

Check VREF Circuit Voltage At TP Sensor Turn ignition off.
Disconnect TP sensor wiring harness connector.
Turn ignition on. Measure voltage between VREF and SIG RTN at TP sensor wiring harness connector.
If voltage is 4-6 volts, connect TP sensor and go to next step. If voltage is not 4-6 volts,
test CIRCUIT.

Check Signal Circuit For Short To Ground Turn ignition off.
Disconnect suspect sensor.
Disconnect PCM 104-pin connector.
Check for damaged wiring, and repair as necessary.
Leaving PCM disconnected. Measure resistance between test pin No. 38 (ECT) or No. 39 (IAT) and test pins No. 24, 51 and 91. If any reading is less than 10,000 ohms, repair short circuit, and repeat QUICK TEST. If all readings are 10,000 ohms or more,
replace PCM and repeat QUICK TEST.
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Tuesday, February 10th, 2009 AT 6:13 AM

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