I've read through some posts here and elsewhere and I most don't post back after I guess their car gets fixed. I just had a valve replaced in my 02 mini s. And now I'm getting a P1237 code. Yesterday I got a P1237, P0108, and a P1688 and my car jumped into limp mode. After a restart it seemed fine. but the light stayed on. When I reset my SES light it will come right back on when I rev the engine. I have replaced the sensor right behind the radiator but not the one beside the air filter. I've seen every post from a vacuum leak to the map sensor. I did a propane check this morning but got nothing. I did unplug the rear sensor beside the air filter while the car was running and it almost died and then picked back up again. All my vacuum hoses appear hooked up and the wires running into the sensors appear fine. Some say it may be the IC gaskets (I don't know what this is) and if so how do I check it. Also what's another way to find my problem. I have seafoam... Is this my answer? The car has several mods and still seems to pull really hard. Thanks for any pointers...

 

I think it has to do with vacuum or the MAP/BARO pressure ... but I'll need to reference my manual at home for those codes. If no one else has responded by then, I'll add it then.

Just off top of head ... have you tried disconnecting the vacuum line to see what happens? It should run without the line connected if all is good.

 

P1237 is related to the fuel system (it's not documented in my list)
P0108 MAP/BARO pressure circuit high input
P1688 is related to the ECM (it's also not documented in my list)

With the latter tripping, I'd look at your fuses and modules in the ECM. Might be simple relay or fuse failing.

 

Ok just wanted to update my problem on the P1237 code. I had a smoke test done and there was nothing found. Had both sensors changed on supercharger, and I had a fuel line repaired inside of the tank. The light used to come on after the 2nd start-up every time and when I picked up the car it was off and I've driven it several times and it's stayed off until tonight and it's back on. I just don't have $150,000.00 to spend on a $8,000.00 car. I'm sick and tired of this. I am just gonna live with this light and carry on. The car still runs great and the fuel mileage is still great. I just wish Mini would have put the check engine light in the speedo and not in the tach right in front of your face. Is there a way to turn the engine light off FOREVER? I'll just hook my OBD II up to it every now and then to see all of my new codes. I'm really starting to have a love hate relationship with this car. It's looking like this Mini is gonna get replaced with another Turbo S Volkswagen...

 

I just ordered new Alta intercooler bellows for it. If this doesn't fix it, maybe it will catch fire and burn to the ground...

 

Any updates? I just got slammed with a p1237 code last night. I am hearing what I think sounds like a vacuum leak, but I need to dig into the engine bay to find out where it's coming from. I am hoping that will fix it.