Malfunction indicator lamp illuminated on daewoo lacetti

It means that service is required.

Hi John:
DTC P0700 - Transmission Control System Malfunction
Many vehicles have a control module for the automatic transmission called a transmission control module (TCM). The engine control module (ECM) communicates with the TCM to monitor the automatic transmission for faults.

If the TCM detects a fault in the automatic transmission and sets a transmission related fault code, the ECM is informed of this also and sets a P0700 in the ECM memory.

This illuminates the Malfunction Indicator Lamp (MIL) to let the driver know there is a problem. If this code is present and the MIL (Malfunction Indicator Lamp) is illuminated that basically means there is at least one transmission code set in the TCM's memory. P0700 is an informational code only. It doesn't point to a direct fault in the engine, only a general fault in the transmission. More diagnosis is necessary to identify what the transmission fault is. This requires a scan tool that will communicate with the transmission module.

Symptoms of a P0700 DTC may include:
Malfunction Indicator Lamp (MIL) illumination
The transmission may exhibit drivability problems like slipping, etc.

More often then not, the cause of this code is that there is a transmission problem of some kind. The TCM detected the problem and set a code. P0700 means that a fault code is stored in the TCM. However this doesn't rule out the possibility of a failed PCM or TCM (unlikely).

Possible Solutions:
For a P0700 the only real solution is to acquire a scan tool that will communicate with the transmission control module. Extracting this code from the TCM will be the first step in repairing the fault in the transmission.

If the TCM compatible scan tool will not communicate with the Transmission Control Module then that is a good indication that there may be a fault with the TCM itself.

Fee free to contact us if need additional details. Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

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the only way to tell what caused the malfunction indicator lamp to come on is to have the car put on a scanner to see

there were no efi engines in 54 so guessing that it is either a 95 , 04 or 14 plate plater vehicle
run the fault codes to determine the exact fault
most probably the EGR system that is faulty

malfunction indicator lamp or MIL, means that something is out of specifications from what is expected by the computer.

Have the car scanned with an OBD-II compliant scanner that covers 1996 and up vehicles.

You can buy your own at Walmart or Sears for under $100.

Call your local dealer with your vin # ,, there is a recall for that specific code.
96-5-16 • MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATION - CODE P1742 STORED IN MEMORY - NO DRIVEABILITY CONCERNS PRESENT - VEHICLES WITH E4OD TRANSMISSION BUILT THROUGH 10/15/95 • LAMP - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATION - CODE P1742 STORED IN MEMORY - NO DRIVEABILITY CONCERNS PRESENT - VEHICLES WITH E4OD TRANSMISSION BUILT THROUGH 10/15/95


MARCH 1996 PCM - MIL ON/DTC P1742 Set

The above problem could not be entered completly on Fixya, because it was not possible to select the type of my car which is a Daewoo Lacetti. So in order to get my problem displayed I had to choose another car type.
So please disregard my issue. I will solve this problem other way.

hi we are in the process of replacing the timing belt on a daewoo lacetti 2004mbut we not sore on the cam timing could anyone help

you bought a daewoo - thats your problem, theyre ****- solution, roll it off a cliff

It may be the same problem as my 56 plate Lacetti. The yellow malfunction light came on two weeks ago and two days ago, both times shortly after filling up with petrol to the brim, and I suspect it is the petrol sensor as I only clicked the petrol cap once after fitting it back - the handbook says click it several times. The yellow light also came on yesterday after taking the car a short journey so it is likely that the sensor is still picking up a small escape of petrol, but the car has been fine today with no light appearing now that the fuel level has dropped a bit. Like you, I have not noticed any drop in power with the light on.