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How to determine ecu problem - 1994 Honda Civic

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Posted on Nov 26, 2012


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2005 hyundai elantra gt 2.0l ECU replacement

I don't know for sure but I think the ECU will need programming with the vin-sensitive security code(s) and possibly other information that is exclusive to your car.

The so-called flashing is used to instal software patches and fixes in service when problems are encountered. Unless you are unlucky a new or official replacement ECU should already be loaded with the latest software version, but again the dealer should be your first port of call to ask such questions and then maybe compare notes and prices with a few local specialists..

I suggest you check with the dealer and ask if the part number has been superceded, or if the unit has been modified in the last ten years.
If there are no changes to the spec, the replacement ECU should have exactly the same part number as the original.

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What activates the fuel injecters

The crank position sensor (and or) the cam position sensor send a message to the computer. The computer then activates the fuel injectors and coils.

Mar 03, 2015 | Cars & Trucks

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1998 jetta turbo no power

Lack of fuel.
Boost hose off or split.
ECU detected Over Boost and engine now in default.
Do you get normal power after restart? If so, ECU is limiting power as it has detected a problem. Need scanner to determin what code/s has been set in ECU.

The boost hose under the engine on the right side
where it goes to the turbo has a habit of coming apart at the clip .

Mar 11, 2014 | 1998 Volkswagen Jetta

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Ml270 will not turn over and come in up on the dash startin error i have put a ecu in it and a starter

Have you have the replacement starter and ecu coded to the car? You need to have the vehicle connected to a star diagnostics system to determine the fault.

Mar 10, 2012 | Cars & Trucks

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I need to know where to find my Mass airflow sensor?

Need to know the make, model and engine size to determine part location, but those are always on the intke manifold plenum...Mike

Jun 14, 2011 | Chevrolet Malibu Cars & Trucks

1 Answer

I have a 2001 jaguar s type 3.0 liter and i replaced the ecu module and the vehicle doesnt start . is there any setting or resetting i have to do fo it to start thanks

First thing to determine is if your ecu module ,has the same hardware,software references as your original ecu.If this is the case,and you havent changed anything else,like keys or ignition switch or immobilizer,then it should start!
If ecu doest have same references,you need to have it coded by the dealer,so that it works with your immobilizer.

Mar 05, 2011 | 2001 Jaguar S-Type

1 Answer

How do the cooling fans come on

They are electronically controlled, normally monitored by the ecu by the temperature sensor. They come on when the ecu determines the temperature to exceed the cooling capabilities of the coolant. usually about 190-200 degrees.

Sep 04, 2010 | 1997 Pontiac Grand Prix

1 Answer

How do I read the check engine codes on a 1993 mitsubishi mighty max?

At the ECU there is a connector that you use standard analog volt meter. In using the twio proper PIN connections the ECU will give yoy a type of Morse code to determine engine and sensor errors
If you like I can email you these codes.
Best regards,

Aug 27, 2010 | 1993 Mitsubishi Mighty Max

1 Answer


There is a problem with the emissions system, an the ECU has set a fault code. The ECU will have to be scanned. The fault code you retrieve will help in determining what the problem is.

Aug 02, 2009 | 1997 Saturn SW

1 Answer

Map sensor

the (MAP) sensor is one of (ECU) engine control unit sensors
it was determine the engine manifold pressure and send it as electrical signal to the (ECU) to calculate the air volume & fuel injection to the engine


May 19, 2008 | 2000 Daewoo Leganza

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