jazz5000

Hi Guys

Have a 2014 W212 E63.

Car is currently in limp and has the following codes:

P045800 The purge valve of the evaporative emission control system has a short circuit to ground.
P044400 The purge valve of the evaporative emission control system has an open circuit.
P024511 The output for the low-pressure turbocharger has a short circuit to ground.
P023B00 Actuation "Coolant pump of charge air cooler" has a short circuit to ground.
P069100 The output of electric fan 1 has a short circuit to ground.
P06DB00 The actuation of the valve of the oil pump in the combustion engine has a short circuit to ground.
U104787 Communication with the oil sensor has a malfunction.
P059800 The coolant thermostat has a short circuit to ground.
P005700 The output for the heater of oxygen sensor 2 (cylinder bank 2) has a short circuit to ground.
P003700 The output for the heater of oxygen sensor 2 (cylinder bank 2) has a short circuit to ground.
P005100 The output for the heater of oxygen sensor 1 (cylinder bank 1) has a short circuit to ground.
P003100 The output for the heater of oxygen sensor 1 (cylinder bank 1) has a short circuit to ground.

Bit of background info the previous owner had the car remapped and then had also installed down pipes after.
I believe the last four codes will be because of this and need to be mapped out.

Am unable to read engine oil temp and also coolant warning light is on but coolant is topped up.

All the short to ground codes im not sure if this is all linked to one thing causing the rest of the codes?

If anyone has any idea would be much appreciated.

Thanks

Cifdig

I would check the main harness ecu plugs for oil at the pins . Open circuit means broken wire, or a pin that’s not completely contacting due to access oil. Worth a shot. Especially if front work hasn’t been done recently.

jazz5000

Fuse 22 - 40amp fuse was blown.


Replaced the fuse and car was back to normal with no codes. This lasted around 50 miles of driving and then the light has returned back on.


Does anyone know what sensors are linked to fuse 22 to help with pinpointing the fault.

Getting the car checked by MB Indy tomorrow also.

PeterUbers

You're still grounding somewhere and short circuiting to blow that high amp fuse obviously ... harness is bad or has liquid on it or you have a stuck/sticking relay

for the w212 this covers engine electronics fuse 22; bad ecu possibly? Bad connection to ecu? I would reseat the ecu and check the integrity of the ecu harnesses (there are two of them)

this is the beauty of me having a cloned ecu of my stock ecu. I tuned my cloned ecu and I can always go back to stock to rule out hardware issues

mertd93

Any outcome on this? I’m having same codes on w216 cl63 due to a short wire from water pump housing thermostat but can’t locate any blown fuses. Was the 22 fuse on e63 at the front dam or rear Sam?

w1s

Hello guys, I know it's an old thread maybe I'll revive someone with this post haha.

Anyways, same problem here!

My mechanic unplugged every connection that has fault codes, and fuse 22 still keeps blowing... As soon as he connects the ECU the fuse 22 blows.
He went on vacation, when he comes back he'll try disconnecting the ignition coils as well. He has an idea about it. Will keep you all posted.

CaliBenzDriver

every component unplugged means one thing: HARNESS!

did I read O2 heaters circuits are involved... harness around hot stuff! Visually inspect all downstream/upstream wiring harness...

> connect a DVM/Ohmeter with a continuity beeeper at fuse line and start exercising harness sections gently while listening for beep discontinuitions.

> the list of components on that fuse#22 and their location will give you ideas where to trace the circuit route.

this should bring in result unless the short goes intermittent. At that point you can use a tone tracer that injects a pulse you can follow regardless.

Good luck for a quick catch.

w1s

If it's ECU harness.. since fuse blows with everything disconnected...Damn it's going to cost some money.

CaliBenzDriver

it may or may not... it's easy to professionally bandaid couple crispy wires ie. much faster and cheaper than swapping a section of engine harness.

The hard part is pinpointing the problem to solve it.

w1s

Thx for the idea, will call my mechanic tomorrow and I'll pass it on. Miss my car

samlab

i have the same issue with my 2011 cl63 been working on it for so time

CaliBenzDriver

What sort of DTC get logged with your limp modes?
How frequently?