OM642 keeps throwing codes.
Thread Starter
Newbie
Joined: Apr 2020
Posts: 5
Likes: 0
2008 Jeep WK w/ OM642
OM642 keeps throwing codes.
I own a 2008 Jeep WK with the OM642 engine at over 320k km. I recently had a shop replace my camshaft sensor with a new one that I had purchased from a Mercedes dealership; the engine was throwing the P0341 Code indicating either a circuit or cam sensor fault. When I drove home the engine code was still illuminated, so I cleared the code with my scan tool.
I find that if I clear the codes and then drive it for 10 to 15 km the code for P0341 will reappear. Other codes that have occurred as well are:
1) P0698 - Sensor Reference Voltage 3 Circuit Low
2) P0402 - EGR Excessive Flow Detected
3) P2237 - O2 Sensor 1/1 Pump Cell Current Circuit/Open
i) Are these codes all ignition related? Or are they not related to each other?
ii) How do I isolate each of these codes to certain components?
iii) Do I need additional tools such as a power probe or more indepth scanners?
iv) What are some of the highly susceptible causes? What are the less susceptible causes?
v) What do I ask of my diesel mechanic to do? Is there anything that I could resolve on my own?
I find that if I clear the codes and then drive it for 10 to 15 km the code for P0341 will reappear. Other codes that have occurred as well are:
1) P0698 - Sensor Reference Voltage 3 Circuit Low
2) P0402 - EGR Excessive Flow Detected
3) P2237 - O2 Sensor 1/1 Pump Cell Current Circuit/Open
i) Are these codes all ignition related? Or are they not related to each other?
ii) How do I isolate each of these codes to certain components?
iii) Do I need additional tools such as a power probe or more indepth scanners?
iv) What are some of the highly susceptible causes? What are the less susceptible causes?
v) What do I ask of my diesel mechanic to do? Is there anything that I could resolve on my own?
Last edited by KMS081991; Apr 22, 2020 at 01:59 PM.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Easiest to start would be checking O2 sensor plug. If that doesn't help, this is cheap sensor and on my Mercedes was easy to replace.
With good luck other codes might be results.,
With good luck other codes might be results.,
Thread Starter
Newbie
Joined: Apr 2020
Posts: 5
Likes: 0
2008 Jeep WK w/ OM642
So I drove it today as I normally do.
Every other day I drive the Jeep, other days I drive my mother's Nissan Sentra; I drive for about 30 mins to an hour, doing various errands, just to get the engine up to temp as much as I can. I don't clear the previous codes I have.
The thermostat housing and cam sensor were replaced the previous week at the diesel mechanic I use. I drove 15 mins or 10 km to the furthest grocery store, I park it and shop for about 15 mins and come out; it starts right up and I drive another 10 to 15 mins to the next store. I parked again for about 5 to 10 mins; I came out jumped in and waited for the fuel pump to prime and then attempt to start it.
It cranks, then stalls, then almost tries to start again.
I turn the key a second time, it cranks then misfires and stalls.
Third time it starts. I connect my scanner and it pulled U1132 Lost Communication with Generator.
I drove home and parked, turned of the Jeep and started it again, it started up fine and idled well.
What should I look into?
The thermostat housing and cam sensor were replaced the previous week at the diesel mechanic I use. I drove 15 mins or 10 km to the furthest grocery store, I park it and shop for about 15 mins and come out; it starts right up and I drive another 10 to 15 mins to the next store. I parked again for about 5 to 10 mins; I came out jumped in and waited for the fuel pump to prime and then attempt to start it.
It cranks, then stalls, then almost tries to start again.
I turn the key a second time, it cranks then misfires and stalls.
Third time it starts. I connect my scanner and it pulled U1132 Lost Communication with Generator.
I drove home and parked, turned of the Jeep and started it again, it started up fine and idled well.
What should I look into?
Last edited by KMS081991; Apr 23, 2020 at 11:36 PM.
Thread Starter
Newbie
Joined: Apr 2020
Posts: 5
Likes: 0
2008 Jeep WK w/ OM642
My mistake I don't mean prime as in I prime the engine, I usually listen for the the fuel pump and watch the needle move. It did that in all the cases.
