Alright, I've been having problems with my car stalling out 4-6 times when I initially crank up daily (when the engine is cold). I've just kind of dealt with it. I've replaced my fuel filter which stopped the stalling I was experiencing while driving, but the startup problems are still going on. My CEL has been on for a long while, but it went on and off for a while. The codes I'm receiving are:

P0136 Rear heated O2 Sensor, B1S2 Malf
P0135 Front Right Htd 02 sensor heater circuit, B1S1
P0155 Front Left Htd 02 sensor heater circuit, B2S1

I'm about to go attempt to clean the O2 sensors, as it seems they are all failing.

Questions: Do you think cleaning will be enough to stop the problem and pass emissions?
Could this be what is causing my stalling problems when my engine is cold (it's perfect once it's warm)?

Any helpful links on locating each of the sensors would be helpful as well.


P.S. - I searched and found no one experiencing stalling problems on a cold engine. I had the other problems people were stating (stalling at red lights, ect), but I fixed that with the fuel filter. This is different.

 

o2 sensors come in to play when the car is warm(closed loop).They have no effect on the way the car runs when the car is cold (open loop).May be another sensor causing it to throw O2 codes or another problem.First I would clean the iac valve,throttle body and MAF.Good luck.

 

Temp sensor will cause hard starts, stalling, and even no start. O2 shouldnt affect starting.

 

+1 to that

 

.

what year? miles on car? auto or 5spd? what maintenacne done recently? cmon man, provide the basic info lol.

Since u only mention replacin fuel filter ima assume no other cleaning has been done.

First Clean MAF and TB per how tos. REplace ECTS. Check CPS. Check tranny side CKPS for fouling. CHeck battery voltage with car on and off. Clean ground pints for CPS and CKPS on the UIM. Hell, clean all ground points. Replace Air filter and PCV. Provide better descriptioin of problem. U may also have faulty FPR (fuel pressure regulator, it basically holds gas in teh engine. overtime it can wear and release gas pressure back upstream requiring 3-4 cranks to repleninsh gas to injectors)

Do all teh following and reset ECU. IF CEL dont go off, get a damp cloth and wipe o2 sensors. Reset ECU. if that dont work may need to replace o2 sensors.

Report back if any question or conditions dont improve.

 

FOR FUTURE SEARCHERS.... before cleaning all the stuff abov etc.

CHECK THE 02sensor fuse.

15Amp fuse in by the drivers knee under steering wheel. Ive noticed when ALL three codes come up together in such a manner, a lot of people over look the fuse.

It happened to me, I ended up even checking the Harness for breaks etc.. then finally decided to look at the fuse.