The Mégane II Owners' Club

i have a 2003 megane II petrol 1.4 54K

it has recently started to go in limp mode when i drive it. it is this every other time i drive it and i have noticed that it only goes in limp mode exactly when the engine coolant temperature gauge is exactly quarter of the way up the scale. it does it when the coolant temperature is fully covering the quarter of the way up scale so that you canot see the mark. also when it comes up to this level of temperature if i only lightly press the accelarotor pedal it does not go in to limp mode.

the only fault code that i get with this is P0638: Throttle Actuator Control Range/Performance (Bank 1)

i have cleaned the throttle body
checked the coils
checked the plugs.

i am now thinking maybees a new throttle body or accelarator pedal or could it be something to do with a temperature sensor coolant or air.

i have had an elm 327 on it and the freeze frame data for this code is as follows:

P0638 is the dtc that caused this freeze frame data to be stored

Fuel system 1 status: closed loop control using oxygen sensor-normal
Calculated load: 72.5%
Coolant temperature: 75 deg C 167.0 deg F
Short term fuel trim bank 1: 3.13% lean (-)
Long term fuel trim bank 1: 10.94% rich (+)
Intake manifold pressure: 88kpaA 12.8 PsiA
Engine speed: 2189.oo rpm
Vehicle speed 68 kmh 42mph

so as far as i know i think the fault is related to coolant temperature and load of the car at this temperature.

hope someone can help

The manual says: DF079 0638 Motorised throttle valve automatic control.

have this problem i think but how can you ttell if its in limp mode and if possibnle how do you fix it ??

when mine enters limp mode it will not rev past 3000 RPM in any gear and also the tiniest touch of the accelerator pedal makes it rev up high like you have your foot to the floor.

ive had that before jsut suddenly happened but what would cause it ?
if ive had it once does it mean it will still be affecting it ??

i am going to put a new throttle body on mine see if that sorts it.

Did you follow the procedure for calibrating the ECU following the disconnection of the battery and cleaning of the throttle body?

i dident realsie there was a procedure is there and what is it ?
and would cleaninig the throttle body cure the problem of check injection?

hi dave could you tell me how to recalibrate the throttle body or point me to the location in the manuals.

thanks.

Nathan,

It's not a question of calibrating the throttle body, more the ECU. It (according to Haynes) needs to relearn your driving habits after a battery disconnection - where such settings are lost.

I don't have the manual to hand, but the basic procedure (from memory) is to start the engine and maintain an idle speed until warmed up, followed by a minute or two at 2000k rpm, and finally 15 minutes of mixed mode driving.

This may or may not be a Haynes generic paragraph. If you have the manual, it's near the back. If you want further detail (I'll copy it out verbatim), ask.

i also have this check injection message problem on my 2003 1.4 megane. i guess this is very common problem for this year and model. however no one could say a way to fix it. I dont want to bring it to renault dealer, but garages are not able to say something.
could anyone find a solution to this?
cheers

I have the same problem has anybody solved it??? cheers

i still have...
after a while you will get used to living with it
anyway;
i guess it is related to one of the sensor but which?

Anyone cured this fault yet???

hey there,

living with it its doesnt solve the problem

Using the Elm 327 cable whats the best software to use with renault? that way you could get the error codes, if any, and put them here.

cheers