Question about 2007 Saturn ION-2 Quad Coupe

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AC Stopped working last Friday morning. Worked

AC Stopped working last Friday morning. Worked fine Thursday night. Took to saturn Friday said I needed a new compressor. Cant afford that so took to another shop. They said it is an electrical problem. Not enough power to compressor. They could energize compressor and it worked fine. Said somewhere between Head unit and compressor. What could this be?

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6ya6ya
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Posted on Jan 02, 2017

blueextc3221
  • 15935 Answers

SOURCE: will not pass emissions code p0401 infuficient egr flow

EGR flow is monitored by the PCM by it looking for a reaction in the FRONT O2 sensor in responce to the command given to the EGR valve. The linear electronic EGR valve sends a return signal to the PCM indicating the relative position of the step motor and hence how far open (or closed) the EGR valve is in responce to the PCM command. The PCM expects to see (within a set of given parameters) a change in the O2 sensor reading (change in exhaust gas make up) after the EGR valve is commanded open or closed. If it doesn't, or that change is not within the expected parameters, a code will be set based on the skewed data. Generally a "insufficient flow" code will be set by:

1.Faulty EGR valve (sticking, or "lying" to the PCM about the actual valve position)
2.Faulty electrical connection at the EGR valve (causing false data)
3.Clogged EGR passages
4. Bad read from the MAP, or TPS, causing the PCM to misinterpret the EGR data based on faulty operational data from the other sensors
5. (Very rarely) A marginally "slow" O2 sensor. (PCM does not "see" the change in exhaust make up quick enough and interprets that as poor EGR flow.)
I have found that normally this code means that the EGR is not opening the amount that it has been commaneded to by the PCM. Normal cure for me lately has beed to repalce the EGR valve and to clean out the passages while the valve is off. The Tech 2 is able to command the EGR open and show the commanded opening and the actual opening. When this code is present the actual and commanded do not match closely at all. Thanks for using FixYa - a FixYa rating is appreciated for taking the time to answer your FREE question.

Posted on Mar 29, 2009

  • 1129 Answers

SOURCE: 98 Saturn SL AC/cooling fan will NOT work

Do not let this car over heat a blown head gasket will ensue. Locate and replace the fan relay, if that doesn't fix the problem unplug fan and use jumper wires to ground the plug then feed power to the positive side of plug to check fan, if that doesn't work replace the coolant temperature sensor located somewhere near the intake manifold or thermostat housing area.

Posted on Jul 01, 2009

bargainbin2
  • 123 Answers

SOURCE: 99 saturn no heat or defrost

Sounds like your heater core is mostly stopped up. You need to have your cooling system back flushed and cleaned.

Posted on Sep 12, 2009

  • 1 Answer

SOURCE: my 06 saturn ion, power steering light is on. when

my power steering light came on what is a matter

Posted on Oct 21, 2009

  • 1 Answer

SOURCE: 98 saturn sl2 won't start

I went out and started my 98 Saturn SL2 it started but died immediately and won't start again, it treis to turn over but won't. Can anyone help me?

Posted on Apr 01, 2010

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