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Old 12-19-2011, 11:54 PM   #1
sdeltoro93
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1996 SL1
Dizzy 3 Codes.. Throttle Position Sensor, both oxygen sensors no activity ? ???

So my engine light came on jad it scanned and it.said throttle position sensor, and both oxygen sensors have no activity? ?? Is this an electical problem or is it the throttle position sensor setting the oxygen sensors off??? Help plz

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Old 12-20-2011, 04:53 AM   #2
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2003 L-Series 3.0L Sedan
Default Re: 3 Codes.. Throttle Position Sensor, both oxygen sensors no activity ? ???

None of the above. New member? With no background car info on any maintenance done, start from the beginning with these suggestions first; replace the coolant sensor if its the round nosed plastic one with a flat nosed brass one and replace the old thermostat with a new 195F one. These two items will fix many engine/transmission issues too numerous to list, including possible emissions testing halted with incorrect engine operating temperatures (the two O2 sensors not working).

If the throttle body hasn't been cleaned, remove it for disassembly of the tps and iacv for a thorough cleaning. Search in the How-to library for these tips.
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Old 12-20-2011, 10:36 AM   #3
sdeltoro93
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1996 SL1
Default Re: 3 Codes.. Throttle Position Sensor, both oxygen sensors no activity ? ???

I Have replaced the thermostat last week. Ill get one of the ects sensors today. But why wouldnt the o2 sensors work??

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Old 12-20-2011, 11:15 AM   #4
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1996 SW2
Default Re: 3 Codes.. Throttle Position Sensor, both oxygen sensors no activity ? ???

Get the codes. The descriptions are interpreted to sell you parts.

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Old 12-20-2011, 11:22 AM   #5
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1998 SC2
Default Re: 3 Codes.. Throttle Position Sensor, both oxygen sensors no activity ? ???

On the back of the block, underneath the #4 cylinder intake runner and above the starter there is a 10mm bolt with 4 wires underneath it. These are the PCM and sensor grounds. You can see these if you take off the plastic air intake and look under the throttle body/intake just around the corner on the back. Verify all 4 wires, 2 black and 2 tan wires are attached and the ring terminals and block surface are clean. Do not drop the bolt as it will lodge behind the starter. Also verify that the TPS wiring is all connected.

Get the actual code numbers also....

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