Check Engine Light

A decrease in horse power?

There are hundreds of things that can cause the check engine light to come on. See related questions below for more info.

How do you reset engine light on jeep liberty diesel

I do not ever recall seeing this question!

Be forewarned though, the base diagnostic trouble code (DTC) descriptions are very short & cryptic.

But it's a good start to identifying the components/sensors/readings that are involved.

See "Related Links" below for 2 sources of Ford OBD codes listings...

a 2000 dodge ram 1500 the check engine light is on and the code says torque converter and clutch and overdrive solenoid. what do you think that the problem is?

look a little closer, that one usually tells you that a door is ajar, and there should be a little open door at the correct door on the light.

Also depends on the vehicle on my truck it says door open driver side i kept shutting it but it was passenger mine tells me door open but doesnt tell which one.

it is obd1 so an autozone or advance cannot check it. some shops still have an obd1 scanner tool, you can buy the adapters at the stores above. its pretty pricey to get the adapter tho cause you still need to buy the scanner too. i would take it to a shop unless you know how to jump the ecu to get it to flash(i believe you can do that on nissans too).

Trouble code P0401 means:Exhaust gas recirculation flow insufficient detected

shaped like an engine

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. A flashing light is usually an indication of a misfire.

The light is on because the ECU had detected a problem with the emissions system. Once you have the problem fixed the light will go off. Have the ECU scanned and this will tell you the trouble code that has been set. This code will tell you what part is being effected, but not necessarily the defective part. Unless you are knowledgable you should seek professional help.

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.

Disconnect the negative battery cable from the battery and wait a few minutes then reconnect the cable. But, if the problem that caused the light to come on hasn't been fixed the light will come back on.

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When the check your engine light comes on in a vehicle it can mean various things. The light is part of the vehicles diagnostic system and acts as a warning that something may be wrong with your vehicle.

The most common engine check engine light codes would be indicating that something has gone wrong under the bonnet basically. Each manufacturer has different codes and so the garage uses diagnostic computer tools to find out the problem.

locate timing chain guides.

There are pages and pages and items that can cause a check engine light. You need to have it checked for codes with a scan tool. After repair light can be shut off with scan tool.

P0447 Evaporative Emission Control System Vent Control Circuit Open

Possible open circuit, check the connector at the evap canister for water and corrosion as this part is exposed to the elements and wet weather will cause moisture to enter the connector and replace the part as soon as possible your gas mileage will improve :)

Leaded fuel, an engine that burns oil... Not sure of ALL the things that can cause problems but those are sure high on the list.

There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.

it means you need to check the engine

With a scan tool.

Evaporative Emission Control system vent control Circuit po446 code