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Hello All,
Well, something has finally happened. After 6+ years of flawless, trouble free driving(130,000+ mile) this morning my beloved 2014 GLK 350 started right up as alway but then started to stumbled and idle rough. I limped her to the garage(200 yards) and read the codes:
P2092- A Camshaft Actuator control circuit low bank 2B
P2094- B Camshaft Actuator control circuit low bank 2C
P0348- Camshaft Position Sensor A Circuit High Bank 2
P0393- Camshaft Position Sensor B Circuit High Bank 2
Also "Random Misfires", Misfire Cylinder 4, Misfire cylinder 5 and Misfire Cylinder 6
I do my own maintenance, oil , plugs, Trans&rear service etc. but I'm hoping for some advice and help with this.I have searched the forum but don't find much specific to this scenario.
Has anyone seen or dealt with this? It seems like a broader issue than just changing sensors out. She ran tip top yesterday.
I have a Very basic generic scanner so any help or insight into deciphering these codes would be appreciated.
Thanks in Advance
Last edited by PACIFICMAN; May 24, 2023 at 02:15 PM.
2006 Alfa Romeo Brera, 2010 GLK350, 2018 BMW 640i GT, 1997 Subaru SVX, 2012 Moto Guzzi Norge GT8V
Sounds like camshaft adjuster magnets, part of the variable valve timing system. I replaced mine around 90,000 miles with this kit. FCP Euro Cam Adjuster Magnet Kit
Thanks Silver, What led to this action, replacing the magnets, on your part? I'm trying to get some insight into the codes and hopefully my GLK issue before I begin installing parts.
Has anyone one else had similar issues with these codes and rough idle / misifre / limp mode. I have only driven her across the property, slowly, but it shows no willingness to run properly. There were NO issues the evening before this began.
Please, anyone with insight or knowledge in this area weigh in. I'm sure within all the forum members Someone must have an idea of the problem and how to proceed.
P2092- A Camshaft Actuator control circuit low bank 2B
P2094- B Camshaft Actuator control circuit low bank 2C
P0348- Camshaft Position Sensor A Circuit High Bank 2
P0393- Camshaft Position Sensor B Circuit High Bank 2
Also "Random Misfires", Misfire Cylinder 4, Misfire cylinder 5 and Misfire Cylinder 6
Generally, when you get codes referring to "circuit high" and "circuit low", it's essentially pointing to an electrical issue. In this case, with two sensors simultaneously reporting, I'd doubt that the problem is with the sensors but in some common link TO the two sensors. I believe (but am not sure) that the "high" indicates battery voltage where there should be something less at the sensor.
There may be a common ground for these sensors and actuators, and if it's loose, corroded or broken, that could explain the readings. Alternatively, check to see where the sensors and actuators are "powered from"... sorry, I don't have my "real computer" with me so can't look that up (but hopefully someone can). I'm hoping that you don't get this type of code(s) with a slipped timing chain issue (again, please chime in if this isn't the case).
So, I pulled ALL the fuses in the engine bay fuse box. The 15 Amp in slot # 24 was blown, replaced it then ran car for a moment and it re blew. Of course I don't have the fuse chart for my 2014 GLK 350(in my 2002 C230 it was handwritten) It would seem that the Cam Magnet / Sensor / Etc. are fed through this circuit. Does anyone have a fuse chart for a base model 2014 GLK350 in hand? If only to give me a clue as to where to search(ie: what else is on this circuit, if anything) for what I presume is a short. I will strip the top of motor ancillaries, covers etc. tomorrow but hoping for some additional guidance as I chase wires, etc.
Note: there is a second 15Amp fuse, unblown, in the next slot to the rear of the blown fuse. Are these 2 15's perhaps protecting different cylinder banks?
I believe the magnets are inert, so no real chance they're blowing the fuse themselves. If you don't want to go through a lot of fuses, you could just temporarily wire a fairly heavy light bulb across the fuse that's blowing. That way, it will just light up bright and you can start unplugging things until the light gets dimmer again, at which point you know which one was drawing heavy current.
Replacing three of the four is easy. The fourth requires a bit more effort. It is odd that all four sensors threw a code. I would replace the sensors, clear the code and see what happens. I’m concerned your timing chain may be worn and stretched.
Originally Posted by PACIFICMAN
Hello All,
Well, something has finally happened. After 6+ years of flawless, trouble free driving(130,000+ mile) this morning my beloved 2014 GLK 350 started right up as alway but then started to stumbled and idle rough. I limped her to the garage(200 yards) and read the codes:
P2092- A Camshaft Actuator control circuit low bank 2B
P2094- B Camshaft Actuator control circuit low bank 2C
P0348- Camshaft Position Sensor A Circuit High Bank 2
P0393- Camshaft Position Sensor B Circuit High Bank 2
Also "Random Misfires", Misfire Cylinder 4, Misfire cylinder 5 and Misfire Cylinder 6
I do my own maintenance, oil , plugs, Trans&rear service etc. but I'm hoping for some advice and help with this.I have searched the forum but don't find much specific to this scenario.
Has anyone seen or dealt with this? It seems like a broader issue than just changing sensors out. She ran tip top yesterday.
I have a Very basic generic scanner so any help or insight into deciphering these codes would be appreciated.
Hello Everyone,
Resurrecting this thread after my unsuccessful attempts to work through and clear these codes and get the GLK back in service.
I'm hoping to get some information from the group regard the info contained in the codes, ie;
Which bank is which 1Vs. 2(drivers side / passenger side)?
I believe the "Low" and "High" refer to voltage, yes?
Can anyone see if the #23 circuit(15 amp fuse blows on key turn) is dedicated to one side/bank of the other?
#24 Circuit is a 15 amp fuse as well, does not blow, are they dedicated to opposing sides?
In my efforts so far I've disconnected, cleaned and reconnected the Sensors(passenger side), Magnets and Coils(passenger side) sequentially and tried each action with a new fuse, they blow on key turn. Now I feel like I need to take manifold cover off to access the driver side bits and facilitate what may be the impending R&R of the PCS's and magnets.
Again the Codes: P2092- A Camshaft Actuator control circuit low bank 2B P2094- B Camshaft Actuator control circuit low bank 2C P0348- Camshaft Position Sensor A Circuit High Bank 2 P0393- Camshaft Position Sensor B Circuit High Bank 2
Also "Random Misfires", Misfire Cylinder 4, Misfire cylinder 5 and Misfire Cylinder 6
Any advice or insight would be Super appreciated
Thanks!
Last edited by PACIFICMAN; Jun 25, 2023 at 07:53 PM.
I had a similar situation, cam position sensors throwing codes, random misfires, etc.
It turns out the cam position sensors were leaking and oil was wicking down the wiring harness and into the ECU mounted on the side of the engine.
I pulled the harness connector to the ECU and spotted oils in there; it changes the resistance and the ECU compensate and caused misfires all over the place along with cam phasing issues.
The ECU was saved but the wiring harness had to be replaced. This is more common on M278 engines but can happen on the M276 as well.
Last edited by MarkFrank; Jun 26, 2023 at 09:26 AM.
I had a similar situation, cam position sensors throwing codes, random misfires, etc.
It turns out the cam position sensors were leaking and oil was wicking down the wiring harness and into the ECU mounted on the side of the engine.
I pulled the harness connector to the ECU and spotted oils in there; it changes the resistance and the ECU compensate and caused misfires all over the place along with cam phasing issues.
The ECU was saved but the wiring harness had to be replaced. This is more common on M278 engines but can happen on the M276 as well.
wow... a connector with that sort of significance/importance should not be letting anything in.
John CC, Thanks for the reply, however it is fuse / circuit #23(15 Amp) that I'm asking about. I have searched for the chart, hand written on my previous C230, but have not been able to find it.
Does the chart you have show what the #24 fuse / circuit does? Is it the opposing cylinder bank?
Last edited by PACIFICMAN; Jun 26, 2023 at 02:03 PM.
Mark Frank, Thanks for this info! I'll be opening the connector today. I have found oil residue in the various sub system connectors I have been dealing with.
UPDATE: Completely clean and dry in both front and rear section of the ECU connector.
Last edited by PACIFICMAN; Jun 26, 2023 at 02:38 PM.
wow... a connector with that sort of significance/importance should not be letting anything in.
Well, like i mentioned it’s being wicked in. It’s not that the oil is pouring out on top of the connector but is coming through the pins of the sensor up the pin along the wire harness and into the ECU
I get that. I did find oil residue up on some of the connectors I opened and cleaned. I'm going to remove the plenum / mani cover and dig into that ban, terrible access with top assembly in place.
Did you do the harness replacement? Degree of difficulty?
I get that. I did find oil residue up on some of the connectors I opened and cleaned. I'm going to remove the plenum / mani cover and dig into that ban, terrible access with top assembly in place.
Did you do the harness replacement? Degree of difficulty?
I did not, I found an independent shop based on recommendations here since the dealer didn’t find it. TBH I was not expecting this, I thought maybe I was dirt from my gas tank since the misfires were all over different cylinder.
it ran me $4200 and it took the shop 3 days to do it, along with changing the four cam position sensors and the four solenoid for cam adjustments, an oil change even though I did it 200 miles earlier.
Last edited by MarkFrank; Jun 26, 2023 at 02:54 PM.
I just went out and looked at the card in the car. It is much less specific. It is indexed by function. 23 and 24 are found under "engine electronics" 24 is also listed under "fuel system". It confirms that 23 should be 20 amps. With luck, that's your whole problem...
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