Hope this helps 2000 528iT (manf-12/99) @ 200,000 miles
I am holding the pedal steady & 1/2 way, engine should reach a stable 4-5000 RPM
My (former) mechanic said i needed a new transmission ($2000+ !) & Carmax said they would give me $300.00 on trade, an insult!
so I took matters into my own hands...
- idled fine
- but ran rough as soon as you touch the pedal
- would not hold RPM or go above 2000 RPM
so ->
-unplug mass air flow (MAF) sensor, RUN , but sometimes ran rough & sometimes smoothed out and ran great!
-shut off, plug in MAF
- EML & DCS (circular arrow light with triangle "! " in center) lights disappeared IDLE SMOOTHER THAN EVER HAS , revs out ,Transmision DOESN'T SLIP!!! Held it in first? Stepped on it & shifted to 2nd ok.
- 5 minutes later of revving DSC & then EML came back
From my Carista WIFI / iPhone code reader:
OBD2 - confirmed:
P0101 - Mass or Volume Air Flow "A" Circuit Range/Performance ( yes I unplugged it)
P1542 (Google, forums: Pedal / throttle position sensor -
P1189
EML CAN transmission torque (DSC?) safe mode
collectively gained advice:
#1 vacuum leak in intake
#2 throttle body sticking
#3 servo or sensor error - need new throttle body
Explored the BMW intake yesterday
Found a couple vacuum leaks & bad hoses,
1. vacuum hose (1/8") broke to oil seperator
2. plastic box attached to upper intake bellows not seated
3. bad hose (3/8) upper intake bellows
cleaned everything & dielectric grease some seals on intake. Tighten everything bit more when I put it back together & ran worse. But ... Oops forget to plug in throttle body. HaHA !
these codes:
P0120 - Throttle/Pedal Position Sensor/Switch "A" Circuit
P1765 - CAN Throttle Valve
Just remembered my mistake while watching tv, so ran out 10pm in dark to plug it in - then All error code gone & it runs fine. Fixed it with time, learning understanding from forums & youtube, patience & stuff lying around from my fuel filter & regulator repair.