Hi all, I just switched out my thermostat housing on my 2007 r56 non-s cooper with 87k miles.

Previously I was getting a OBD code of p0128 (coolest temperature below thermostat regulating temperature) and I had a small leak too. I just finished swapping out the housing, I labeled all the sensors and hoses making sure everything is connected back to where it belongs.

Good news is I no longer have a leak and no longer throwing the p0128 code.

Bad news is I am now throwing three new codes, and the engine will go into limp mode if I accelerate the car hard.

P1637: Throttle Valve Position Control, Control Deviation
P0120: Throttle Position Sensor/Switch (TPS) A Circuit Malfunction
P2103: Throttle Control Motor Relay Circuit Short

As you can see they are all related to the throttle, I am pretty sure I caused it during the thermostat housing replacement.

I am hoping somebody can point me in the right direction on where to look to solve this issue.

I followed the directions on this post: https://www.northamericanmotoring.co...hermostat.html

Was one of the sensors I removed during the procedure the TPS?

 

Bringing up an old thread. No one replied but I was hoping someone may now have some incite. I know I didn't disconnect anything to do with the throttle body. The issues is not a consistent thing. I can clear the codes and they stay cleared for a while and they didn't show up until a couple of days later. I'm going to do a visual inspection, clean the connectors and run the test on the pedal that is in the Bentley manual.

 

I'm having the same problem, any solutions?

 

Anybody in this thread solved their tps problem?

 

I ended u having to replace the throttle body and I did my thermostat housing while I was t it, that solved all my problems. Good luck!

 

I have seen P1637 P2103 with recommendations for cleaning up carbon build up, which should be done on these vehicles every 50k miles. Thread here for reference. Otherwise for P0120, throttle housing assemblies here if needed.

 

I've replaced multiple throttle bodies due to oil ingress, on one of them I actually found corrosion due to condensation ingress.

If you've determined that your TPS codes aren't for the pedal then you'll probably need a throttle body.

 

Thanks guys for responding back!

 

About to replace throttle body on my 08 R56 S and I see relearn throttle body at end of procedure. I'm deathly allergic to dealers and I need to find out how to relearn it.


Please help

 

Just install it.

Worst case scenario, you need to have someone reset the adaptations.

 

Yep, just install it and dont move the plenum. Reply back here to help others. I didn't find out with mine bec i sold the car as is.