2009 3.8 variable valve timing issue DRIVNG ME CRAZY LOL.

[carguy75]

Thanks so much for posting on this topic. I am having very similar codes (bank 2 sensor 1, misfires in cyl 4 & 6) and also found the OCV leaking and wicking into the wiring harness and into the injector connectors. I plan to replace the OCV assemblies and go from there since I already replace O2 sensors, spark plugs, and leak check the vacuum intake. Thanks for any insights.



2009 Genesis 3.8 Sedan - 4Door 5P; 3.8L Lambda; DOHC - MPI
102,000 mi.

Codes:

P0153 O2-Sensor Circuit Slow Response (Bank 2 / Sensor 1)

P0306 Cylinder 6 - Misfire detected

P2189 System Too Lean at Idle Bank 2

P0300 Multiple Cylinder Misfire Detected

P0304 Cylinder 4 - Misfire detected

P2189 System Too Lean at Idle Bank 2

P0153 O2-Sensor Circuit Slow Response (Bank 2 / Sensor 1)

Misfires are usually spark plug related, so I would consider changing the spark plugs. Lean codes usually means an air leak or crack vacuum hose. Low O2 sensor voltage related codes could mean a bad O2 sensor.

Older cars usually will need all of the above replaced to completely solve the problems, which are fairly common due to age.

 

[amarbaatar]

Misfires are usually spark plug related, so I would consider changing the spark plugs. Lean codes usually means an air leak or crack vacuum hose. Low O2 sensor voltage related codes could mean a bad O2 sensor.

Older cars usually will need all of the above replaced to completely solve the problems, which are fairly common due to age.

Thanks carguy75 for the reply. I have already changed the spark plugs, smoke leak tested the intake and lines, replaced the fuel filter, and replaced the O2 sensor in bank 2 sensor 1. Still the same issues. I think it may be related to the leaking OCV bleeding oil into the electrical connectors but not sure. I’m planning to dig into it soon.

 

[Qship]

P0300 codes are misfires that aren't specific. Generally it means ALL cylinders are misfiring which means replace all plugs and coils. Going by what Autozone provided, it looks to me that you've got a burnt out cat (or 2, maybe all 4) since a flashing CEL means a catalyst damaging misfire is happening (ask me how I know).
If you've been driving the car for a while with misfires happening, it's a 99% sure bet that at least one of the cats is toast. The O2 sensor needs an air/fuel mix to read, if the cat is plugged there won't be enough air since there's nowhere for the exhaust gases to go, so pressure builds up, the gasses will escape anywhere before the cat (through gaskets, manifold, exhaust joints etc) which will also throw off the engine temp control since your engine is now working double duty to overcome the amount of back pressure.
I've fried multiple cats (cheaping out on parts, namely coils). It really does cause a mulititude of issues.
Hopefully it's not your case, but to me, it points towards what I mentioned.

 

[amarbaatar]

P0300 codes are misfires that aren't specific. Generally it means ALL cylinders are misfiring which means replace all plugs and coils. Going by what Autozone provided, it looks to me that you've got a burnt out cat (or 2, maybe all 4) since a flashing CEL means a catalyst damaging misfire is happening (ask me how I know).
If you've been driving the car for a while with misfires happening, it's a 99% sure bet that at least one of the cats is toast. The O2 sensor needs an air/fuel mix to read, if the cat is plugged there won't be enough air since there's nowhere for the exhaust gases to go, so pressure builds up, the gasses will escape anywhere before the cat (through gaskets, manifold, exhaust joints etc) which will also throw off the engine temp control since your engine is now working double duty to overcome the amount of back pressure.
I've fried multiple cats (cheaping out on parts, namely coils). It really does cause a mulititude of issues.
Hopefully it's not your case, but to me, it points towards what I mentioned.

UPDATE:

Thanks for the suggestions everyone. I ended up changing out the exhaust Oil Control Valves (OCV) on both the left and right hand sides since they were leaking oil which required removing the valve covers. I also found a bad oil leak in on the one of the bank 1 camshaft position sensors and swapped that as well and the bank 2 sensor 1 O2 sensor along with all spark plugs on that side. I didn’t my best to clean the oil out of the connectors and harness and will continue to check them to see if residual oil continues to wick through the wires.
So far so good. After clearing all the codes, none have come back. The engine is running MUCH better now and gas mileage is back to normal after driving for 3 days now.

 

[MrXperc]

UPDATE:

Thanks for the suggestions everyone. I ended up changing out the exhaust Oil Control Valves (OCV) on both the left and right hand sides since they were leaking oil which required removing the valve covers. I also found a bad oil leak in on the one of the bank 1 camshaft position sensors and swapped that as well and the bank 2 sensor 1 O2 sensor along with all spark plugs on that side. I didn’t my best to clean the oil out of the connectors and harness and will continue to check them to see if residual oil continues to wick through the wires.
So far so good. After clearing all the codes, none have come back. The engine is running MUCH better now and gas mileage is back to normal after driving for 3 days now.

Hi guys, Im happening to have both my intake ocv's (24355-3CAB1 for Right) and (24355-3CAA1 for Left)
replaced due to P0018 cel code. Does this require removal of upper intake manifold and intake manifold to reach the OCV's? Also should I also replace the exhaust OCV's too at the same time since they require removal of valve cover so all 4 will be brand new. The dealership quoted me like $5000 for this job lol so have to do this myself.

 

[pnwbr82]

Hello. I recently had my 2009 Genesis V6 diagnosed with bad OCV solenoids. It drives fine for a while and then will start idling poorly and eventually the car will start shaking when it’s at a stop.

The two that you circled in your picture below have oil leaking into the solenoids on my car. My mechanic only gave me a 75/80% guarantee that changing them out will solve the problem, so I think I’m going to try and do this job myself.

I can’t seem to locate the intake solenoids. Do you have to remove the intake manifold to see them? Did you inspect those too? Any help would be much appreciated as I try to solve this problem. Thanks in advance.

UPDATE:

Thanks for the suggestions everyone. I ended up changing out the exhaust Oil Control Valves (OCV) on both the left and right hand sides since they were leaking oil which required removing the valve covers. I also found a bad oil leak in on the one of the bank 1 camshaft position sensors and swapped that as well and the bank 2 sensor 1 O2 sensor along with all spark plugs on that side. I didn’t my best to clean the oil out of the connectors and harness and will continue to check them to see if residual oil continues to wick through the wires.
So far so good. After clearing all the codes, none have come back. The engine is running MUCH better now and gas mileage is back to normal after driving for 3 days now.