Mercedes-Benz W204 C Class 4 Cylinder Engine ECU Repair (Turbocharged engine)

We offer a repair service for your Mercedes M271 engine ECU.  The w204 C class engine ECU frequently fails causing the engine to miss fire and store fault codes that suggest one or more coils are faulty. These fault codes will reoccur even after the coils have been replaced. This Ecu can also fail causing oxygen sensor and mixture is too rich faults. Another common issue we see with this ECU is that the engine all of sudden refuses to start, this fault often won’t leave fault codes however the drive authority data in the engine ECU won’t display a status in live data. If your ECU suffers a drive authority data issue we will also require you send the ignition switch and at least one key.
Our service includes repair of all known issues, often replacing parts with higher rated components to ensure reliability of this ECU into the future. Most turbo charged Mercedes c180 c200 engine ECUs are repairable if the fault is caught early enough. In the rare case that your ECU is beyond repair we stock reconditioned exchange modules that can be programmed to your vehicle. All ECU repairs come with a 12 month unlimited km warranty.

Common symptoms include:

Miss fire in engine
Car won’t start
Drive Authority data shows no status in live data / actual values
Engine light on dash

Common fault codes are :

P230000 The actuation of ignition coil 1 has a short circuit to ground.
P2300 The actuation of ignition coil 1 has a short circuit to ground.
P230100 The actuation of ignition coil 1 has a short circuit to positive.
P2301 The actuation of ignition coil 1 has a short circuit to positive.
P230300 The actuation of ignition coil 2 has a short circuit to ground.
P2303 The actuation of ignition coil 2 has a short circuit to ground.
P230400 The actuation of ignition coil 2 has a short circuit to positive.
P2304 The actuation of ignition coil 2 has a short circuit to positive.
P230600 The actuation of ignition coil 3 has a short circuit to ground.
P2306 The actuation of ignition coil 3 has a short circuit to ground.
P230700 The actuation of ignition coil 3 has a short circuit to positive.
P2307 The actuation of ignition coil 3 has a short circuit to positive.
P230900 The actuation of ignition coil 4 has a short circuit to ground.
P2309 The actuation of ignition coil 4 has a short circuit to ground.
P231000 The actuation of ignition coil 4 has a short circuit to positive.
P2310 The actuation of ignition coil 4 has a short circuit to positive.
p017227 The mixture (cylinder bank 1) is too rich. The signal change rate is above the permissible limit valve.
P219622 The signal from oxygen sensor 1 (cylinder bank 1) is shifter towards “rich”. the signal amplitude is greater than the maximum amplitude.

Common part numbers are:

A 2711500391 , A 0034468840

Total repair cost is $650 Inc GST 
Workshops with a ABN please contact us for trade pricing   

Please do not erase the fault memory prior to sending us your unit, if the fault memory has been cleared please ensure you include a detailed description and paper work with all the fault codes that were present before they were erased.