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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 01-23-2013, 10:04 PM   #1
Cayne23
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Join Date: Sep 2012
Location: forest hill, md
Posts: 445
My Ride: 2002 m3 convertible
eml light dsc light

Eml light still coming on. Followed by dsc light then limp mode. After a restart the lights are gone. When i drive, I feel a little surge in acceleration for a millisecond then the eml light comes on. When i slow down, the dsc light comes on. I took my car to my indy shop and I had my codes read. They were codes 76, 77, 77, 79. I took my car back to the shop to get the 2 motor tps sensors replaced, but i asked them to test them first. They did, and told me they are both working correctly. They let the car idle for 15 minutrs, no eml. They test drove the car, no eml. Then they suggested i let them run throttle adaptation software, so i said yes. That didnt help. I still get the eml light. Could my throttle bodies just be dirty and sticking? Today i started my car for the first time and my eml light was on. I did a restart and it stayed on. I drove the car and everything seemed ok. No dsc light, no limp mode, but eml light is on. After 6 restarts the light is still on. Forgot to mention that its only 23 here today which makes me think.the throttle bodies could b sticking. Any ideas? Any help would be great
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Old 01-23-2013, 10:36 PM   #2
$ilent ///M
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My Ride: 03.5 M3 smg lsb
what do those codes break down to (description)
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Old 01-23-2013, 10:40 PM   #3
turbo_f22_pilot
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What makes you think it's one of the TPS's?

Is this what they say your codes are?
76 Ambient Air Pressure Sensor (DME Internal)
77 Intake Air Temperature Sensor
78 Engine Coolant Temperature Sensor
79 Exhaust Gas Temperature Sensor
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CAR:
2003 TIAG Coupe / Blk Interior / SMG / HK Premium
MODS:
EU-CSL Coded / Macht Schnell intake / OEM CSL Wheels / OEM CSL Diffuser / Dinan Exhaust
Full LED Conversion / HID fog / Aurora AE / RE RTAB FCAB

BMWCCA NCC

Last edited by turbo_f22_pilot; 01-23-2013 at 10:44 PM.
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Old 01-23-2013, 11:05 PM   #4
Cayne23
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My Ride: 2002 m3 convertible
Codes: p0118
p0119
p0120
p0121

Throttle potentiometers signal faorult comparison. I cant remember the exact wording for the codes
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Old 01-23-2013, 11:21 PM   #5
$ilent ///M
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P0118 Engine Coolant Temperature Circuit High Input

P0119 Engine Coolant Temperature Circuit Intermittent

P0120 Throttle/Pedal Position Sensor/Switch A Circuit Malfunction

P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
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Old 01-24-2013, 02:33 AM   #6
turbo_f22_pilot
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The first two would be themostat sensor. Might have to check them, since it's been really cold where you're at the last couple of days.

The last two are for your accelerator pedal. You need someone with a INPA/GT1/DIS laptop or a shop with a GT1 to test your accel pedal and the TPS's for proper functioning.

The laptop would be cheaper since a shop will probably charge around $90+ per hour.
__________________
In order to finish FIRST, you MUST first FINISH !

Joy is future proof
Get your "M" on . . .
Reading is FundaM3ntal




CAR:
2003 TIAG Coupe / Blk Interior / SMG / HK Premium
MODS:
EU-CSL Coded / Macht Schnell intake / OEM CSL Wheels / OEM CSL Diffuser / Dinan Exhaust
Full LED Conversion / HID fog / Aurora AE / RE RTAB FCAB

BMWCCA NCC
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Old 01-24-2013, 05:30 AM   #7
Cayne23
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Ok, sorry, i think i posted the wrong codes. Here's the printout i got.
DME;
*78 ELECTRIC THROTTLE POTENTIOMETER SIGNAL COMPARISON
*76 ELECTRIC THROTTLE SIGNAL POTENTIOMETER
*77 ELECTRIC THROTTLE SIGNAL POTENTIOMETER
*79 ELECTRIC THROTTLE BOTH POTENTIOMETERS

So when i took my car back into the shop, they tested both of them, and said they were working correctly.
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Old 01-27-2013, 08:56 PM   #8
Cayne23
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Any thoughts as to maybe just dirty throttle bodies?
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Old 01-27-2013, 09:44 PM   #9
illestminimike
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It is probably the one under the intake manifold that is failing.
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Old 01-27-2013, 10:42 PM   #10
rcsummers
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throttle position sensors, and/or throttle body actuator. hopefully its not the latter. that cost $$$$. trust me. I know.
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Old 04-30-2013, 05:10 PM   #11
tommytoyz
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Throttle position sensor on your intake manifold. I think the M3 has two. The car uses the DCS to bring the car into limp mode if it does not know what the gas pedal position is. It can also be your gas pedal, which has a sensor in it too, that connects to the position sensor. It's not the throttle body. The last thing it may be is the wire connectors, corroded or dirty.
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