Question about 2000 Ford Expedition

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Service engine soon light doesn't work

Won't pass smog because the light isn't coming on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 74 Answers

SOURCE: engine light comes on

you are dealing with a bad temperature switch

Posted on Jun 18, 2008

ewashmidas
  • 362 Answers

SOURCE: I have a 1997 Ford Explorer. Check engine light

Here is a list of possible causes, hope this helps.


Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with one of the components or sensors it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you need to diagnosed and repaired it. The list of possible codes number in the hundreds. The code itself doesn't tell exactly what component is defective - it only indicates where to look, or what engine parameter is out of normal range. You or a technician will have to perform further testing to pinpoint cause and the proper repair. Even if you reset the light, if the underlying problem is not addressed it will come back on.

Possible Causes onepx.gif Setting Conditions onepx.gif onepx.gif onepx.gif onepx.gif

  • Air leaks after the MAF sensor, or leaks in the PCV system
  • Vehicle running out of fuel or engine oil dip stick not seated
  • EGR valve gasket is damaged or leaking around the gasket
  • Exhaust leaks before or near where the HO2S is mounted
  • Fuel injector(s) not supplying enough fuel
  • Fuel system not supplying enough fuel during high fuel demand conditions (e.g., the fuel pump may not supply enough fuel)
  • MAF sensor is dirty (can cause PCM to underestimate airflow)
  • Intake gasket leak

Posted on Mar 10, 2009

  • 4369 Answers

SOURCE: 1979 ford ranger, did not pass smog

Oxygeb sensor failure or EGR not working, bolcked passages.

Go to autozone and get failure codes for free if newer than 1996.

Posted on Jun 10, 2009

  • 497 Answers

SOURCE: 03 Ford Expedition service engine soon light

Take it to your local mechanic to get an OBD code check. It should tell you the problem, and you can get an estimate on the fix unless you want to do it yourself. It could be a fuel filter issue.

Posted on Sep 06, 2009

  • 1146 Answers

SOURCE: The check engine light stays on or comes back on

Hi:
Your P0446 code is a Evap vent valve code: Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test.
copyscape.gif Symptoms There will be no obvious symptoms to driver, other than MIL illumination.
Causes A code P0446 could mean one or more of the following has happened:

  • Faulty vent valve
  • Open, short or excessive resistance on Vent valve control circuit
  • Blockage of vent valve
  • Bad PCM
Possible Solutions With a P0446 OBD-II trouble code, here are some things to try:
  • Replace Vent valve
  • Repair open, short, or resistance problem in control circuit
  • Repair open, or short, or resistance problem in power circuit
  • Replace PCM

Posted on Nov 20, 2009

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PO402--EGR Flow Excessive Detected

There are other components besides the
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Have to educate yourself

Do not wait for someone to tell you things

You won't learn or remember if you don't
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Need my Liberty to pass smog I recently had codes po445 and po442, will this be a problem for passing smog if check engine light isn't on? Not sure if problem was resolved with new gas cap.


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