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Oil temp not displaying, hard starts, and a sputter death
Hey all, I have searched the forum and not found any good answers so here we go: 10 C63 with 82k miles.
A few days ago, I had a long start. Had to re-start the starting sequence, and then it fired right up. Car drove fine from there, other than a CEL that popped up. I was going to stop and have the code read, but after one errand, it disappeared. I thought nothing of it.
Flash forward to yesterday, and I have the same initial sequence. Hard to start, but after stopping and reinitiating the start, it fired up. Same CEL displayed, so I was certainly planning to run it over to get the codes run. I also noticed that the Oil Temp was not displaying a temperature, but instead ---. Coolant was at normal temps. After a few minutes, I noticed a little tremor in the acceleration, so I pointed the nose back home. On the way, I completely lost power (no throttle response at all, but the car was still running), and I shifted into N and coasted to a safe place to park it where a tow truck could access. As soon as I did, the engine died while I coasted. I got a few loud crackles/pops from the exhaust as it did. I was only two blocks from home, so I sat there for a second, let it rest, and tried to turn it over. It did fire up (after one long start), so I drove it gingerly the two blocks home and parked it in a spot for pickup.
What I know:
Oil Temp is not displaying
Car did lose power and engine died
Inside edge of serp belt appears to have bubbled/frayed, and obviously will require replacement (discovered this when I popped the hood yester)
I have a local Indy, but they don't see a lot of M156s, so any help to point them in some potentials will be helpful. I did see in a search a few folks who had similar issues, albeit with neither having all the same symptoms.
Questions:
Where is the oil temp sensor and what powers it?
Is there an accessory that oil temp or oil pressure depends on? Is the pump run off the AC compressor?
Roger. I took it in this morning, and my Indy ran the codes. He got two cam position sensor errors, one for each bank, intake side. That was it.
Belts going to be replaced, and likely Oil Temp Sensor, as once he cleared the codes, it read -40 F... which is unlikely as its rarely forty below in south Texas.
If you've ever thrown any belts make sure he checks for any fraying on the cam position sensor wires. They are very close to the belt and can easily rub on the belt if they're not secured properly. Other than that cam sensors are very easy to replace.
The belt itself is frayed on the inside. I bet that's part of the problem... good lead, and sincere thank you. I'll be sure to post all the final verdicts!
Hey all,
Well, the car has been down for over a month, and my indy cant figure out what is wrong. The belt definitely slipped and tore the wires out of the cam sensor. He has re-wired that, and checked it for function and its working properly (per him), but the car is still throwing the codes. Any ideas?
So I picked up the car today and drove it home. My Indy doesn't think he can figure out what the issue is, so I guess it will be heading somewhere else. The issues are as follows:
Codes: P0343, 0348, 0368, and 0393... all four cam position sensors reading "short circuit to positive or open circuit", as well as 0340: all cam sensors not detected. Then there is 0193: Fuel pressure sensor short circuit, and 0452: Tank pressure sensor short circuit.
My gut tells me this is some short in the ECU, perhaps a bad ground or a short in the harness, or a bad ECU. I also still have no oil temp registering. Car does start and actually run smooth, but it struggles to start again once warm. I have to try twice to start it.
The belt did some serious work in there... change your belts like you change your undies, guys and gals.
Anyhow, advice on my next step or a good indy in Houston or Austin or San Antonio... either would be appreciated.
Oh, a small town shop in Victoria, TX. I don't want to dog him, as he does all the high-end euro car maintenance in the region, but just knows his limitations. I actually like that he calls me and goes, "this is outside my wheelhouse, and I think you need to take it to the city". I respect that a lot more than a 3k diagnostics bill that doesn't find or fix a problem (which I have had happen before on other cars at other places).
85k miles on her. Did you have a belt slip to cause all the problems as well? You had the same codes (all four sensors?) and found a ground issue? Any details you can provide will be super helpful, my friend!
My problem occurred when I filled up bad old gas from Shell station and started shaking violently before it came to a stop. The shop ran the code and said I needed to replace 1 camshaft position sensor behind the engine. Once he replaced the part couldn't figure out why the car wouldn't start and ended up bringing it to a wiring specialist guy to trace every single wire. At first I thought this guy fried my ECU ended up being a bad ground ( didn't tell me where since it was a 3rd party that worked on it). Sorry I'm no help but I'm pretty sure if you find a guy that knows how to do wiring you'll be able to find it. Also a week later after this happen I did replace my belt and pulley since it was getting old and crusty.
First thing I'd do is check all your fuses, also make sure he correctly fixed the wiring harness. There's very limited space and slack in the harness and can easily be screwed up if not done properly.
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