Question about 2002 Nissan Maxima

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Engine light is always on

Service engine light is always on

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  • Nissan Master
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Stop in at autozone or similar autoparts stores & get free scan to see what code is stored & go from there.

Posted on Apr 16, 2009

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Posted on Jan 02, 2017

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I have a 2001 mustang bullitt that is showing service engine light on. Took it to mechanic and he put 2 different machines on it to show code for problem. No codes coming up and he can't turn off the...


There is a diagnostic procedure in the factory service repair manual for engine light lit ,no codes . Did you take it to ford dealer ? MIL - is referring to check engine , service engine soon etc...
  • MIL always on when engine is running (no DTCs):
  • MIL circuits
  • For Focus, Mustang, Town Car, Continental, LS6/LS8, Escape, Windstar, F-150, Expedition and Navigator/Blackwood:
  • Instrument Cluster, Section 413-01 of the Workshop Manual.
  • All Others:
  • GO to NB1

SERVICE ENGINE SOON indicator After the engine is started, the SERVICE ENGINE SOON indicator will prove out for a duration of three seconds. If the instrument cluster does not receive a message from the PCM within five seconds, the instrument cluster will illuminate the SERVICE ENGINE SOON indicator and log a diagnostic trouble code (DTC).

  • An indicator is inoperative/always on - SERVICE ENGINE SOON
  • Circuitry.
  • Bulb.
  • Instrument cluster.
  • PCM.
  • GO to Pinpoint Test P .

PINPOINT TEST P: AN INDICATOR IS INOPERATIVE/ALWAYS ON - SERVICE ENGINE SOON CONDITIONS DETAILS/RESULTS/ACTIONS P1 CARRY OUT THE INSTRUMENT CLUSTER SERVICE ENGINE SOON INDICATOR ACTIVE COMMAND Trigger the HEC active command MIL.
  • Did the SERVICE ENGINE SOON indicator illuminate?
Yes REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual.

No INSTALL a new instrument cluster; REFER to Instrument Cluster . CLEAR the DTCs. REPEAT the self-test.

Jul 18, 2017 | 2001 Ford Mustang

1 Answer

Service engine light blinking


As we all have done since 1981 --some 32 years now

CHECK FOR CODES--first & every time you get a check light

Blinking verse steady is not always good

Got with the solution fast

Dec 01, 2012 | 2004 Chevrolet TrailBlazer

2 Answers

What's your problem?2004 ford expedition service engine soon light


I assume you resolved the issues by now

Check lights have been on all vehicles for 31 years,
so you shouldn't be asking about them

Does not matter what light comes on your dash

The procedure is always the same
Check for codes
Diagnose & repair code related issues first

Aug 18, 2012 | 2004 Ford Expedition

1 Answer

Check Engine illuminates and Engine rattles


You looked at the coolant sensor? What did you expect to find? I mean, did you actually TEST it or just check to see if it was there?

The only way to diagnose a check engine light is to pull the trouble codes from the computer. That's always the starting point. Then you do the appropriate diagnostic work to narrow it down further. Read this post on check engine lights.
Check engine light on Part Ricks Free Auto Repair Advice

Jul 25, 2017 | 1997 Hyundai Sonata

1 Answer

My service engine soon light is on, do I need to worry


We have had On Board Vehicle Systems since 1983,
some 30 years,why do people still ask these questions

Real simple

You need an owners manual
You need to study OBD2 Systems-on internet

You always have a problem & always have to
check for codes & always have to diagnose &
repair the issues EVERY TIME ANY Light Comes
On Your Dash.

Jun 01, 2012 | 2001 BMW Z3

1 Answer

2003 Buick Century Sevice Engine light


A check engine light doesn’t always mean a big problem or an expensive repair is ahead. However, driving a car with the check engine light on could mean that you are doing further damage to the engine, depending on the problem. It’s always best to get the vehicle checked at your earliest convenience.

Because there are so many possible reasons for the check engine light to come on, pulling the codes for the event can be helpful when the problem is not immediately evident. Even if the check engine light is only on a short time, a code will be stored in the ECU for later retrieval.

I suggest scannin your ECU to know which fault code there.

Hope helps (remember rated this).

Jul 01, 2010 | 2003 Buick Century

2 Answers

Service engine light keeps coming on. have had O2 sensors replaced. still the light comes on...any suggestions what to do?


There are about 100 causes for the service engine light to come on.
Buy an engine code reader and you'll be able to always identify the source of the fault.
This one is less than $50. Plugs in under dash -driver side. Pays for itself in one incident.
http://www.amazon.com/Check-Engine-Scanner-Trouble-Reader/dp/B000LEPT5G

Jul 09, 2009 | 2001 Nissan Pathfinder

1 Answer

Prerunner wont pass smog due to engine service light


Try this:-
Theres a vaccum pipe tht fits on the brakes booster just under the mastercylinder probabely it may have popped out or the sensor could be faulty ....worth a try ;)

May 07, 2009 | 1991 Toyota Pickup

3 Answers

Engine light 2006 pontiac g6(reset)


first be sure that its the engine light and not the "service" light. the service light will usually illuminate if its time for an oil change. if its the service light ur owners manual should tell u how to reset it. if its ur engine light then try disconnecting ur positive battery cable for 1 minute. that should reset ur ecm and get rid of the engine light. if the engine light comes back on then have a diagnostic scan done to determine whats causing it. LJ

Dec 29, 2008 | 2006 Pontiac G6

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