Mystery Cable help - 2003 R53

[ajdoubleu]

Hi!

I have just replaced the shifter selector lever located under the air box of my 2003 R53 mini and I have found a mystery cable that is not plugged in (see picture). I cannot figure out where it goes.

I've ruled out MAP, TMAP, coolant temperature and O2 sensors.

There are two wires going into the connector which are blue + yellow and green + violet

[Luccia at Pelican Parts]

I'd plug into your OBDII and see if any faults are being thrown that might indicate where that connector goes. Also, maybe take a peek at this article here, possibly figure 16 that might show where it's supposed to go: MINI Cooper Performance Intake Installation | Pelican Parts DIY Maintenance Article. I'll do some more digging and see what I can find to where it might go as well. Let me know if there are any P codes present in the system.

[ajdoubleu]

Thanks for the OBDII tip. The code I got back was P0130, pending status, "Mass air flow or volume air flow circuit, high side." The O2 sensors are both connected. So, the mystery remains

[ajdoubleu]

Well, the car is back together and runs just fine without the cable attached to anything. If anyone does have a clue where it goes, I'd love to know.

[Luccia at Pelican Parts]

For P0130, how old are your oxygen sensors? I'd first clear the code and then see if it comes back. If it does, you'll need to replace the pre-cat sensor. You'll want to make sure you use the OEM supplier one, NTK as the Bosch sensor has been known to throw codes for the pre-cat sensor. Typically, people only use a Bosch sensor for post-cat and OEM sensors for pre. DIY here: Mini R53 Oxygen Sensor Replacement | R53 Cooper (2002-2006) | Pelican Parts DIY Maintenance Article. Sensor here if needed: 2003 Mini Cooper S Hatchback - Emissions Equipment - Page 1.

As far as the cable... Are your reverse lights working? I'm wondering if it's possibly your reverse light switch that is disconnected.