While driving check engine light turned on?

Tiny
BOURBON SCHARTZ
  • MEMBER
  • 2008 MITSUBISHI ECLIPSE
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
I instantly heard a kind of quiet ticking sound. Almost like something was against my fan. But I pushed the throttle the ticking increased in speed. So I turned it off and gave it 30 minutes. Tried to restart it and all I did was make a spinning sound. But not one like if it was firing. So I thought maybe the starter lost contact with flywheel. Replaced the starter. It did the same thing. So next I assumed it was the timing belt and it had broke. I bought a timing belt. Pulled the timing cover off. And found the old timing belt looking absolutely fine. Now I have no idea why this is happening.
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Monday, April 27th, 2020 AT 7:25 AM

55 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

Is it possible for you to record the engine turning over so I can hear it? Since it sounds like it is turning too fast, it sounds like compression was lost. Although the timing belt looks good, it still could have jumped timing. If that happened, this is an interference engine and internal damage is likely.

THis video will help is fix it

https://youtu.be/vMwTzURWXmk

If you can't record it for me, I need you to check engine compression and let me know what you find. Here is a link that explains how it is done:

https://www.2carpros.com/articles/how-to-test-engine-compression

__________________

Here are directions specific to your vehicle which indicate what to expect. The attached pics correlate with the directions.

_________________

2008 Mitsubishi Eclipse L4-2.4L (4G69)
Compression Pressure Check
Vehicle Powertrain Management Tune-up and Engine Performance Checks Compression Check Testing and Inspection Component Tests and General Diagnostics Compression Pressure Check
COMPRESSION PRESSURE CHECK
COMPRESSION PRESSURE CHECK

Required Special Tool:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
MB991824: V.C.I.
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A

1. Before inspection, check that the engine oil, starter and battery are normal. Also, set the vehicle in the following condition:
Engine coolant temperature: 80-95 C (176-203 F)
Lights and all accessories: OFF
Transaxle: Neutral (P range on vehicles with A/T)

NOTE: On vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but this is no problem for checks.

2. Remove all of the ignition coils and spark plugs.

pic 1

3. Disconnect the crankshaft position sensor connector.

NOTE: Doing this will prevent the engine control module from carrying out ignition and fuel injection.

WARNING: Keep your distance from the spark plug hole when cranking. Oil, fuel, etc., may spray out from the spark plug hole and may cause serious injury.

4. Cover the spark plug hole with a shop towel etc., during cranking. After the engine has been cranked, check for foreign material adhering to the shop towel.

pic 2

5. Set a compression gauge to one of the spark plug holes.
6. Crank the engine with the throttle valve fully open and measure the compression pressure.

Standard value (at engine speed of 200 r/min): 1,560 kPa (226 psi)
Minimum limit (at engine speed of 200 r/min): 1,130 kPa (164 psi)

7. Measure the compression pressure for all the cylinders, and check that the pressure differences of the cylinders are below the limit.

Limit: 98 kPa (14 psi)

8. If there is a cylinder with compression or a compression difference that is outside the limit, pour a small amount of engine oil through the spark plug hole, and repeat the operations in steps 6 to 8.
(1) If the compression increases after oil is added, the cause of the malfunction is a worn or damaged piston ring and/or cylinder inner surface.
(2) If the compression does not rise after oil is added, the cause is a burnt or defective valve seat, or pressure is leaking from the gasket.

9. Connect the crankshaft position sensor connector.
10. Install the spark plugs and ignition coils.

pic 3

11. Use the scan tool MB991958 to erase the diagnostic trouble codes.

NOTE: This will erase the diagnostic trouble code resulting from the crankshaft position sensor connector being disconnected.

_________________________

Let me know.

Joe
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Monday, April 27th, 2020 AT 10:46 AM
Tiny
BRENA
  • MEMBER
  • 2007 MITSUBISHI ECLIPSE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 22,000 MILES
My check engine light just came on, I don't a manual and I don't know what to do. I have checked all the fluids and they are fine. Can you help me?
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Monday, August 3rd, 2020 AT 2:43 PM (Merged)
Tiny
DOCFIXIT
  • EXPERT
This video will show us how to fix it

https://youtu.be/vMwTzURWXmk

Please run down this guide and report back.
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Monday, August 3rd, 2020 AT 2:43 PM (Merged)
Tiny
KIMM0717
  • MEMBER
  • 2006 MITSUBISHI ECLIPSE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 51,000 MILES
I have a 2006 mitsubishi eclipse v6. My service engine soon came on about 5 days ago. I wanted to get one of those code readers to see if I can figure out the problem myself. I was wondering what the best one would be for my car and where exactly do you plug it in?
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Monday, August 3rd, 2020 AT 2:43 PM (Merged)
Tiny
2CEXPT
  • MEMBER
Try Actron -Google it or just take it to Autozone and have it scan for free the location see below
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Monday, August 3rd, 2020 AT 2:43 PM (Merged)
Tiny
KIMM0717
  • MEMBER
Thanks for the diagram. It helped. As for autozone I tried that they only scan if the check engine light is on not the service engine soon light. But thanks for the help.
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Monday, August 3rd, 2020 AT 2:43 PM (Merged)
Tiny
TEERTLE
  • MEMBER
  • 2006 MITSUBISHI ECLIPSE
  • 3.8L
  • 6 CYL
  • 2WD
  • 102,000 MILES
Service engine soon light on. Car runs perfectly. It is not check engine just service.
Service what?
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Monday, August 3rd, 2020 AT 2:44 PM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

That light is a maintenance reminder light for changing the oil. It is programmed in the PCM to remind you to change the oil.

Roy
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Monday, August 3rd, 2020 AT 2:44 PM (Merged)
Tiny
KCBROOKS
  • MEMBER
  • 2004 MITSUBISHI ECLIPSE
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 138,000 MILES
This morning my check engine light came on and is staying on. What could this mean. Its not making any funny noises and seems to be running ok
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Monday, August 3rd, 2020 AT 2:45 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
Have a local auto parts store retrieve the trouble code(s) for you. Could be anything from a failing sensor to something more major that is setting off the engine light.
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Monday, August 3rd, 2020 AT 2:45 PM (Merged)
Tiny
NATUREBOY
  • MEMBER
  • 2003 MITSUBISHI ECLIPSE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES
I have owned my eclipse for a year now. Recently I noticed that my check engine light comes on when I'm on the highway. Usually when I'm crusing at 60 and decide to pass and really give it gas. Can someone give me an idea of what could be triggering the light? My car shows no sign of mechanical malfunction. I can even take the battery cable off and reset the light, and it wont come on again until I'm in the same passing situation.
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Monday, August 3rd, 2020 AT 2:45 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi Natureboy,

You need a scan done to find out what is the cause of the check engine light coming on.

Based on your description, it could be the knock or O2 sensor.
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Monday, August 3rd, 2020 AT 2:45 PM (Merged)
Tiny
SMDPENGUIN
  • MEMBER
  • 2003 MITSUBISHI ECLIPSE
  • 170,000 MILES
I just had repairs done (water pump, air filter, and timing belt replaced) and I also had an oil change and coolant flush. But the day after, the check engine light comes on. What could be the problem? They didn't indicate anything else was wrong when they analyzed my car, so I am confused why I have the light come on after only driving like 10 miles or so.
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Monday, August 3rd, 2020 AT 2:46 PM (Merged)
Tiny
CJ MEDEVAC
  • EXPERT
THE 1ST THING TO DO IS HAVE IT SCANNED. MANY POPULAR AUTO PARTS STORES WILL DO THIS FOR FREE!

GET THE ACTUAL CODE(S) WRITE THEM DOWN. THE STORE MAY "OFFER" WHAT THEY MIGHT MEAN, BUT THEY CAN SOMETIMES BE INTERPRETED DIFFERENTLY. WITHOUT THE ACTUAL LETTERS AND NUMBERS, THIS END WILL BE IN THE DARK

THIS MAY BE A COINCIDENCE OR MAYBE SOMETHING THEY WAS AFFECTED DURING YOUR FIX

AN EXAMPLE OF "A CODE" IS "P0442", WHICH IS A SMALL EVAP LEAK, PROBABLY THE MOST COMMON REASON BEING CAUSED BY AN INCORRECTLY INSTALLED/ OR A BAD GAS CAP

YOU ONLY HAVE "ONE" CHECK ENGINE LIGHT. MAYBE HUNDREDS OF CODES. SO BE AWARE, YOU MAY HAVE MORE THAN ONE CODE, WHEN YOU GET IT SCANNED. SOMETIMES, ONE CODE "DOMINOES" OTHERS TO SHOW UP

THE MEDIC
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Monday, August 3rd, 2020 AT 2:46 PM (Merged)
Tiny
MADMIKE1735
  • EXPERT
I would bring it back to whatever garage performed these repairs, as its likely they just left a sensor connector unplugged. If they try to charge you, and give you a big story, let us know, and we can tell you whether or not its related to the repairs that were just made. Im sure its something simple.
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Monday, August 3rd, 2020 AT 2:46 PM (Merged)
Tiny
SMDPENGUIN
  • MEMBER
Well I took it back and they didn't charge me anything. Apparently the Catalytic converter code came up; however, the technician said he wasn't really concerned about it. He said that it is likely due to the repairs they did earlier because he thinks the car is running fine (apart from the light). He turned off the light for me and said to bring it back if it comes back on. But he said that my car hasn't been running well since the repairs this past Monday (10/21) and that now my car is running clean fuel and all the blockages are out, and the car just hasn't been running long enough to register with the car. What do you think? Is that bogus or does that make sense?
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Monday, August 3rd, 2020 AT 2:46 PM (Merged)
Tiny
MADMIKE1735
  • EXPERT
Cat code being po420. Usually means the cat is bad. It isnt burning the unburned fuel left in the exaust gas, and once you get the code, they usually dont go away.
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Monday, August 3rd, 2020 AT 2:46 PM (Merged)
Tiny
JAC852004
  • MEMBER
  • 2003 MITSUBISHI ECLIPSE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 868,997 MILES
The "service engine soon" light has come on and I don't believe that you can use a diagnostic code reader on it, as I cannot find anything in any manuels or online about it. I checked all the fluids, which are fine and it sort of feels like its having a harder time switching into second gear, but I'm not positive. Is there anyway I can check what the light means myself?
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Monday, August 3rd, 2020 AT 2:46 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi jac852004,

This is a service reminder which will show after a certain mileage and is no cause for alarm.

Get the service done and resetting it will do the job.

As for the gear changes, you might need to scan the TCM for any error codes. Sometime a change of ATF can do the job.
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Monday, August 3rd, 2020 AT 2:46 PM (Merged)
Tiny
ANDREWGORDON
  • MEMBER
  • 2003 MITSUBISHI ECLIPSE
  • 155,555 MILES
I have p codes 0431, 0171, and p code 0133 throwing on my 2003 mitsubishi eclipse. The gears sometimes slip and my check engine light is on. Some professional at firestone has said that I might need to replace some sort of sensor close to the maf sensor. Maybe the air temperature sensor? What am I to do?
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Monday, August 3rd, 2020 AT 2:46 PM (Merged)

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