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I have an 04 Alero. I just changed my battery and now my service vehicle soon light came on. I went to AutoZone and they said their scanner didn't read any codes. What should I do?

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  • Cars & Trucks Master
  • 15,575 Answers

Do you know how to do electrical testing ? Have a volt meter ?
Malfunction Indicator Lamp (MIL) Always On
Battery positive voltage is supplied directly to the malfunction indicator lamp (MIL). The powertrain control module (PCM) turns the MIL ON by grounding the MIL control circuit.
This step determines if the condition is with the MIL control circuit or the PCM.
Did you perform the Diagnostic System Check-Engine Controls?
YES - Go to Step 2
NO - Go to Diagnostic System Check - Engine Controls

2

  1. Turn OFF the ignition.
  2. Disconnect the PCM.
  3. Turn ON the ignition, with the engine OFF.
  4. Observe the MIL.
Is the MIL illuminated?
YES - Go to Step 3
NO - Go to Step 5

3

  1. Remove the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console.
  2. Test the MIL control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 6
NO - Go to Step 4

4

Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console.
Did you complete the replacement?
Go to Step 6
--

5

Replace the PCM. Refer to Powertrain Control Module Replacement .
Did you complete the replacement?
Go to Step 6
--

6

  1. Turn the ignition OFF for 30 seconds.
  2. Start the engine.
Does the vehicle operate correctly without any MIL illumination, and without any stored DTCs?
System OK
Go to Diagnostic System Check - Engine Controls

Posted on Mar 16, 2016

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

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Michael Gutwein

  • 104 Answers

SOURCE: service engine soon light came on.

That is an EVAP code. its a vent control code. you can manually test it by powering it up if you know where its at. i cant remember exaclty where its at off the top of my head but its only 2 wires. using a volt meter you want to make sure power is getting to it, but you cannot activate it without dealer scan tool.hmmm if you can figure out which is ground and power when you give it 12 volts it should click. meaning your vent solenoid works and you have wiring problems or its leaking.

EVAP problems are hard to finde with out scanners. you can change the vent solenoid and hope it fixes it. but a code points you to the direction of a problem. hopefull its not wiring problems. in the northern states with snow. ice can pull out wires and also get clogged in the vent solenoid and lock it up. its either wiring or bad or a leaking solenoid. check condition of wires. if they look good try a vent soleniod.

if that doesnt fix it after a engine light reset and 2 weeks or so. then goto dealer. you need to reset it after repair. light will not go off on its own.GOOD LUCK

Michael
ASE certified.
plz rate

Posted on Feb 09, 2009

highspeedsan

Randy McComas

  • 61 Answers

SOURCE: service engine soon light 04 nissan titan

make sure the gas cap is tightly sealed. Inspect the gasket on the gas cap

Posted on Apr 30, 2009

Anonymous

  • 1 Answer

SOURCE: service vehicle soon light

ok there is a difference between the check engine light and service vehicle soon light. The service vehicle soon light comes on when a bulb is out on the daytime running lights. Check your bulbs if there is one out and you put a new one in it will most likely take car of problem.

Posted on May 28, 2009

jason jagodzinski

  • 110 Answers

SOURCE: When I start my 2001 alero the anti-lock, traction

the anti-lock and traction lights will come on together if there is a common problem with the two, since they are closely related. may be a wheel speed sensor or something similar. the service engine soon light indicates a problem with the engine computer, can be anything from an emission system problem or an engine performance problem. all of these lights can come on with no apparent running problems on the car. the service vehicle soon light is basically a maintenance reminder, an oil change light. take the car into a shop and have the codes read for these lights.

Posted on Feb 23, 2010

Salvador Quintanilla

  • 1608 Answers

SOURCE: Sevice Vehicle Light

The service vehicle is not the same as the service engine light in that the service vehicle light has to do with the body control module,(BCM).You have to get the codes read for the BCM and any other module with the scan tool.I`m not sure if Auto Zone can read the BCM codes.Not all scan tools are able to read all the modules in a vehicle.Hope this helps.Good luck.

Posted on Mar 16, 2010

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I have a car in the shop right now same thing - it is being caused by a misfire. Need a real technition to diagnose the problem (auto zone - advance auto can't diagnose the problem - only read the code)
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