New Member (R53) Massachusetts
 

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Thanks to all for letting me join....have an '04 S with 188k miles....given to me by my brother....lucky guy. I love the car so far...runs great with a few exceptions I hope to clear up with your all's help here and there. My brother threw alot of $$ at this trying to get rid of an SES light. P0420 and P0036. Wish me luck! I think in January I may not have to worry about them due to the cars' age and Mass law.....fingers crossed. Semper Fi!

Welcome to the forum

Let's guess what branch of the service he or you are associated with ......

Ha!!! :) That would be me...1986-1991 (MOS 8531) honestly, the car was a gift, my brother put that on before handing it over to me. It had some peeling paint on the roof and what a better way to hide it.

Great looking MINI, especially the roof. Welcome to the forum and your new life as a MINI owner.

The P0420 code may be to an intake system air leak. It is really common.
The P0036 code can often mean the o2 sensor heater is toast and needs replacing, but don't do this until you know there is not an intake air leak.
A super charger having air leaks can happen in many areas, including the blow off valve failure.

I think I'm going to hang low till Jan 2019....get the free pass on SMOG for my inspection sticker here in MA.
​​​​​​As I stated earlier, my brother tried a few times to get it fixed after WAY too much $$$ spent and had no luck getting rid of the SES codes....one question tho....I've cleared/RESET the ECU properly, left battery cables off overnight with key on and still cannot get the SES to clear. I thought from reading hereviews I'd at least be able to get it to clear...even if just till the next drive.

Welcome to NAM.

Welcome.

P0420 - Catalyst System Efficiency Below Threshold
P0036 - HO2S Heater Control Circuit

The most common air leak I have had is the vacuum line under the SC

Loads of fun, Best of luck.

Motor On!

There are hard codes that will not go away, until the problem is fixed.