Drivetrain malfunction/fuel supply warning and code P1339?

JTRACE

MEMBER
2012 BMW 528
4WD
AUTOMATIC
140,000 MILES

I have a 528i and keep getting a drivetrain warning and recently it’s followed by a fuel supply warning. I have a cheap code reader that gave me a P1339 which was for the camshaft sensor I replaced both and still have both warnings coming up. The car starts but drives in “limp mode” and has no power and shortly (usually within 10 minutes) of driving it feels like it is running out of gas that’s when the fuel supply warning comes up - I have gas in the car- it will just shut off and die. I have to wait a bit then it will start up again - help! Please! I don’t know much about cars so I’m afraid being a female and taking it in for work without knowing what the problem is they will just throw parts and repairs at me until it’s fixed, and I can’t afford that plus I desperately need my vehicle for work and transportation for my children. I’m afraid to go have it scanned with a better scanner at day auto zone because I already had to have it towed once this week as I broke down in a very unsafe spot. I really need some help here please and thank you so much!

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,895 POSTS

Yep, breaking down is no fun, the information on our end says the codes is for both the crankshaft and camshaft sensors so I would replace the crankshaft position sensor and if that doesn't fix it the timing chain might be the issue which is common on these cars. Here is the information that is given:

The error code P1339 in a 2012 BMW 528i, like in most vehicles, is associated with a problem detected by the engine control module (ECM) related to the crankshaft position or camshaft position sensor.

More specifically, the error code P1339 generally indicates a malfunction within the circuit of either the camshaft or crankshaft sensor. This error can also be associated with timing issues, specifically that the timing of the engine is off due to the misalignment of the camshaft and crankshaft positions.

Potential causes for this error include:

Faulty crankshaft position sensor
Faulty camshaft position sensor
Timing chain/belt misalignment or wear
Damaged or malfunctioning sensor circuit (wiring/connectors)

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