I have been on working on clearing the code on my 99 A4 1.8T, 79,000 miles. I replaced the MAFS, checked the vacuum lines, replaced the vacuum line in the front of the car, the braided one, all the lines good to me. After replacing mafs I reset the code , drove it some, and now the OBD II reader says P1136 pending. What else can I change to clear this for good, an oxygen sensor, if so which one, and is there an online place to get them? Thanks

 

Where should I be looking for vacuum leaks? All the vacuum hoses look in very good condition to me. I read to listen for a leak when the engine is running, but how do u hear a leak over the sound of the engine?

 

P1136 = Long term fuel trim, idling, bank 1 - system too lean, things to look for are fuel pressure/pump, injector(s) seal leak, intake/exhaust leak, AIR system, hose leak

 

Can the oil dip stick not being all the way in be a vacuum leak, or exaust leak, or in any way cause the p1136

 

P1136 Fuel trim too rich at idle. This should not be a vacuum leak. When did you last change you air filter? Could be O2 sensor.

 

Try

www.ecstuning.com

www.rockauto.com

 

crazyhawk P1136 code is too lean , P1137 is too rich. I have code P1136

 

My Chilton Repair Manual disagrees. Go to GOOGLE and search


"OBD II P1136"

It says O2 sensor problem.

You only have one bank.

 

I fixed the dip stick , reset code drove it 20 miles, no codes , put it in park and idled for less then a minute and code p1136 pending came on again. Before the code pending light came all flashing test on the obd2 were done whie i was driving the car, all except the EV, but the EV had cleared before for me with no P1136 . This is the first time the O and the C code went threw their test after I reset ecm.
Would a VagCom tell me anything more?

 

It seems that when driving at decent speeds , which is what I did for the 20 miles all tested ok, but as soon as it was at idle for less thena minute is when the p1136 pending code came on. So is there something to look for that would cause it to come on at idle and not higher speeds?