SPONSORED LINKS

Several codes and limp mode?

Tiny
BHAMDOC1973
  • MEMBER
  • 2014 BMW X3
  • 4 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 164,000 MILES
Bought it as is. Throttle has zero response on revving motor. Starts but had many codes. Deleted them and even before starting the cars the 2nd picture on engine module shows the codes. There are abs codes as well but those are maybe for the ABS sensors which is common and I can take care off. Sometimes runs and stalls.
2014 x3 x28i
Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
SPONSORED LINKS
Thursday, September 14th, 2023 AT 12:15 PM

11 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

I looked at the codes you have. I suspect the oil pressure (too high before starting) is causing the limp mode issue. The pressure can't be too high with the engine off, so suspect there is a short in the wiring to the pressure/temperature sensor or the sensor itself has shorted internally.

I attached the directions below for replacing the sensor. Before you replace it, confirm the wiring is in good condition. Also, with the key on, confirm there is a 5v power supply to it.

Let me know what you find.

Joe

See pics below.
Images (Click to make bigger)
Thumb
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, September 14th, 2023 AT 7:57 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,573 POSTS
Where is it under the intake?
Was this
answer
helpful?
Yes
No
Friday, September 15th, 2023 AT 6:07 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

According to the directions, it is under the throttle body. They never like to make things easy.

If you look below, I attached the directions for removing the throttle body.

Let me know if this helps.

Take care,

Joe

See pics below.
Images (Click to make bigger)
Thumb
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Friday, September 15th, 2023 AT 7:55 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,573 POSTS
I removed the throttle body and I can see one sensor attached to the block which has 3 wires to it. Is that possibly it? I unplugged it so you can see it. If so, which wire should have a 5v with ignition on and what is the part number, please?
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Sunday, September 24th, 2023 AT 7:08 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

It should be a brown wire. The other two will be black and one yellow with a blue tracer. See pic below.

As far as a part number, my manual isn't providing that information.

Take care,

Joe
Image (Click to make bigger)
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, September 24th, 2023 AT 1:16 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,573 POSTS
Yes, there is a 5v on one with ignition on.
Was this
answer
helpful?
Yes
No
Sunday, September 24th, 2023 AT 1:17 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

If you have the power supply, the black wire should provide a ground path. Check to see if there is continuity to ground via that wire.

If you do, suspect the sensor is faulty.

Let me know.

Joe
Was this
answer
helpful?
Yes
No
Sunday, September 24th, 2023 AT 1:48 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,573 POSTS
Yes has ground.
Was this
answer
helpful?
Yes
No
Sunday, September 24th, 2023 AT 3:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

If we have power and ground, chances are the sensor itself is faulty and isn't sending a correct signal.

If you have gotten this far, I would replace it before reinstalling the throttle body. Hopefully that is the issue.

Let me know.

Joe
Was this
answer
helpful?
Yes
No
Sunday, September 24th, 2023 AT 8:07 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,573 POSTS
Replaced the sensor and started it after deleting all codes. Still no response or barely any from gas pedal. Have these codes now.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Friday, September 29th, 2023 AT 3:46 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

When you say little to no response from the throttle, can you record it and upload it for me to see and hear? The one code, 120408, is usually caused by something internal. We may need to check the timing chain. Something is causing the intake cam sensor code.

Let me know.

Joe
Was this
answer
helpful?
Yes
No
Saturday, September 30th, 2023 AT 9:00 PM

Please login or register to post a reply.

Related Engine Computer Limp Mode - Reduced Power Content

Reduced Power - Limp Mode
GUIDE
Reduced Power - Limp Mode
The computer system that controls your car has a built in safety feature called "Reduced Power" or "Limp Mode" which is designed to get the car where it is...

Sponsored links