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Check Engine Light
The check engine light comes on in a car when the engine is experiencing a problem. Ask questions here about your car's check engine light.
7,238 Questions
What if your 2004 Lincoln LS check engine light came on and the car is hesitating?
The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to a parts store or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.
Why is the check engine light blinking on 1998 ford windstar?
If your check engine light is blinking with the engine running that means an
engine cylinder misfire has been detected . You will need to have your
Ford Windstar scanned for any trouble codes to help diagnose and then repair
the problem . You can drive it in to have it repaired , just drive in a moderate
fashion ( avoid any rapid acceleration or deceleration because you can damage
the catalytic converter )
How does the system notify you of the problem if a hardware problem is found during bootup?
Depends on what hardware is defective.
RAM shows during OS boot up and will say something alone the line of DIMM 0 CHANNEL 0 Training Error PMU
Hard drive, PSU, Motherboard just wont allow it to boot up, but may be followed by POST prompts or error messages pointing toward that specific device.
CPU will not let it boot up past OS.
This can all be checked via BIOS in your diagnostic testing.
The computer has detected a malfunction. You need to have it checked for codes.
Could the timing belt be the cause of check engine light on a 2003 Toyota Echo?
No. This car does not have a timing belt.
Emission light on 2008 Chevy Malibu told problem was fixed but light still on?
Depending on what the original problem was, the light may still stay on until it is turned off with a scanner. Even the inexpensive versions have the capability of resetting the check engine light. You may even be able to get AutoZone to turn it off for you for free. If it comes back on, the problem isn't fixed or you have another problem.
My check engine light is on and a green blinking light with an S in it. What does this mean?
On the bright side, the fact the "S" indicator light came on indicates it is an electrical problem rather than a mechanical one. When the A/T control unit senses an abnormality in the input or output systems, the "S" indicator light in the gauge assembly will blink. You have an electrical problem with the transmission. The check engine light may be on simply because the transmission is having a problem or it may be on due to an emissions problem. Have the transmission looked at first by a professional and have him reset the CE light. If it comes back on then you also have an emissions problem. Your priority right now is to have the transmission looked at.
The check gauges light comes on when one of the gauges is not in the safe range.
What causes service engine light soon to come on in a 1994 Mitsubishi Endeavor?
The Service Engine or Check Engine light comes on when the ECU has detected a problem with the emissions system. Do not ignore this light even if the engine seems to be running fine. Failure to repair this can cause damage to the catalytic converter especially if the vehicle is not running good or using excess fuel.
How do you reset the check engine light on a Nissan Murano?
Try diconnecting the battery for one minute. I have a 2005 Murano and it actually resets nicely after 15 seconds of disconnected. Just leave key on and radio, and you can tell right away.
How do you reset check engine light after tune up on a 2000 ford expedition?
try dis connecting the battery for 5 minutes or so. If this doesn't work, you may have to take it to a shop and have it hooked up to their computer system to reset the ECM and check for any other codes.
The keyword in this question is rain...
Water and the engine electrical system just do not 'mix'.
A few pieces of the puzzle to start...
- The flashing check engine light (CEL) indicates the engine computer has detected the engine is misfiring - and lots of it. You should be feeling the engine struggling to run and 'stuttering'.
- Electrical basics:
- The coil generates a high-power electric charge
- The sparkplug wires carries that charge to the sparkplug
Sidebar: The computer (PCM) times the electrical charge to get to the sparkplug at just the perfect time when the air/fuel in the cylinder is ready to fire - The electrical charge enters the sparkplug and ignites the air/fuel into a controlled explosion (of energy).
- Electricity will take the path-of-least-resistance,especially if there is water/moisture to travel along
If there is any weakness or flaw in the connections between the sparkplug wires and the coil, or, at the other end at the sparkplug, the electrical charge is going to escape, or take a detour and not make it all the way sparkplug!
So in this case, focus your efforts on finding where the electric charge / 'spark' is escaping:
- Replace sparkplug wires - chances are yours are original and about 10 years old. They've done their job and time to retire them.
Might as well do the sparkplugs while you're in there. - Inspect the coil for any signs of cracks or breaks / flaws in the surface.
Electricity often leaves a light gray-colored track on the surface of the coil - a good indicator of leaking at the wire/coil connection point.
See "Related Questions" below for very detailed instructions/information on replacing plugs, wires, coil and firing orders and more.
Could be a dead fuel injector.
How can you get trouble code meanings for kenworth?
Call a dealership, talk to the service department, tell them what motor is in your truck and what fault codes you're getting.
What does the codes P0171 and P0174 Mean when your engine light is on on my 2003 Ford Windstar?
Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1) Trouble code P0174 means: Fuel System Too Lean (Cylinder Bank 2)
These 2 codes are common indicators of a well-known failure on the 1999-2003 Windstars. Be sure to review the additional information in the "Related Questions" below...
How do you reset the check engine light in a 2002 Toyota Camry?
It is reset with a OBD2 scan tool, after the repair of the system.
That's a pretty big question with not very much information. First, I'd plug in a code scanner to figure out what the COMPUTER thinks is wrong. The computer is seldom wrong.
My understanding was that it had something to do with the O2 sensor not working properly.
Carbon build up inside the EGR valve can cause a no flow code. The valve is located Ênear the center of the rear of the engine. It is held on by 2 bolts and a metal line.
Why does your vtec on your gsr not kick in at all the check engine light is on?
VTEC stands for (Variable Valve Timing and Lift Electronic Control ) and I have no idea how you would be able to feel it " kick in "
If your engine light is on you will need to have the codes read by a scanner, then you will have a much better idea what you are looking at.
