2011 128i auto, M-sport, 194,000km.
Throwing these codes
P0597 Thermostat Heater Control Unit
P0439 Catalyst System Efficiency Below Threshold Bank 2
P15C9 Rear Wheel Speed Sensor (? I think)
P1505 Idle-Speed Control Value Closing
The thermostat heater code has been on for a few months, I ordered a water pump to do while I was in there but didn't get around to it yet as I have moved and not completed my garage setup. But I did verify thermostat/waterpump operation with a real-time temperature monitor during spirited driving. All functions as expected with respect to temperature regulation
Today it lit ABS and traction control lights (and the (!)) as well as the engine light which was already on. Seems to run fine but the codes above come from ODBII. ABS warning showing on the display.
Battery was changed not too long ago, I coded the correct (changed) battery size and registered it. Ran fine for a few months after that until now.
So, my first thought is to go after the wheel sensor, some research indicates a dirty tone ring or faulty sensor could be the issue. But I'm a little suspicious about these seemingly unrelated codes all popping at once, could it be a bad ground or other systemic fault? Or should I just replace the O2 sensor, speed sensor, Thermostat, and ICV?
BTW anyone know of a good R&R guide for the 128i rear ABS sensor and ring? Having trouble finding anything.
Anyway advice from the E82 gurus here would certainly be appreciated, thanks in advance.
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F22 '17 M240iX
E82 '11 128i Msport
E90 '09 323i
E46 '99 323i
E36 '98 328i Msport
E30 '88 325iX
also, for her:
F48 '17 X1 Msport
E83 '09 X3 3.0i SI
I suggest getting an error read with a tool capable of reading BMW manufacturer codes in all the modules. P code read in engine control module is not cutting it. OBD code readers are designed to read codes from engine modules and are often vague. They're meant for OBD emissions items.
Last edited by 328 Power 04; 01-11-2023 at 10:18 PM.
-Abel
- E36 328is ~210-220whp: Lots of Mods.
- 2000 Z3: Many Mods.
- 2003 VW Jetta TDI Manual 47-50mpg
- 1999 S52 Estoril M Coupe
- 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
- 2019 M2 Competition, self-tuned, 504whp
- 2016 Mini Cooper S
I have Carly would that work?
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