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2012 Chevy Malibu - Camshaft and related issues

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21K views 7 replies 4 participants last post by  Tbull19 
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#1 · (Edited)
I have a 2012 Chevy Mailibu LT, 2.4 Engine (gas only, no flex). Current codes P0335 (Crankshaft position sensor, don't think this is a real issue.. read below) and P0340 (Camshaft position sensor... certainly needs replaced).

Fun started probably a year ago, car started throwing timing chain related issues. Replaced that and the Crankshaft position sensor.

Then I started getting camshaft position sensor related errors (P0340 and I think P0365?). Car was not running bad with these errors but my attempt to order the parts online failed (they sent the wrong ones), and I haven't had time to fix this yet. The car started running a bit rough and I ordered many parts. Replaced all ignition coils, spark plugs and we also replaced the Crankshaft position sensor again because that was throwing a bad code again (pretty much never stopped.. but as I said, the car was running fine). During some of this I also read about the Solenoid/Actuator needing replaced as it could be related to all of this.

Fast forward to this week. Car started stalling out. Usually under load, like going up a hill or accelerating at a light. Would take some struggle and time to get the car to start back up, but when it did I'd get one of three outcomes:
* Car runs fine (not usually the case)
* Car stalls out again shortly later
* Eventually the car starts and runs, but the RPM is stuck at 0 and the car is sluggish at best.

I did replace the Actuator and Solenoid, the car ran fine for most of Sunday... but come Sunday evening, the exact things started happening.

I am replacing the camshaft sensors today.

My question for the forum, do these issues line up with the camshaft position sensors?
 
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#2 ·
As an update, replaced the camshaft sensors. After brief testing (so not absolute), no camshaft codes showed up.

However the P0335 did.

Going to replace the crankshaft position sensor for the 3rd time in 18 months and see if that does the trick.

Current known symptom is the RPM gauge is at 0.

Anybody have any feedback?
 
#8 ·
Clarence Klopfstein said:
As an update, replaced the camshaft sensors. After brief testing (so not absolute), no camshaft codes showed up.

However the P0335 did.

Going to replace the crankshaft position sensor for the 3rd time in 18 months and see if that does the trick.

Current known symptom is the RPM gauge is at 0.

Anybody have any feedback?
Click to expand...
Clear all codes with scan tool. Had similar issue. Ran tool cleared codes and haven't had issues since. That was in like may.
 
#3 ·
Go to the Gen7 forum and find the sticky thread about "fretting corrosion" and see if that leads you down a good path. The RPM stuck at 0 made me think of the BCM having an issue communicating with the IPC, which means that it could also have an issue communicating with other devices, and they could be having a similar issue as well.
 
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#4 ·
So replacing the crankshaft position sensor for the 3rd time in 18 appears to be the thing that finally got me over the edge.

Regarding the BCM, I will re-read the thread now that I've actually looked at mine. I even bought the grease it talked about.. but when I looked at it, I was more confused than I thought I would be. With that being such an important part, I figured no action was better than bad action! Oddly enough, in my driving today I have not has the traction or esc warning.

What a mess, but I am thankful that most of the parts in question are pretty easy for this novice to replace.
 
#5 ·
Have you been using OEM parts ? When it comes to sensors OE is the only part that should be used. Aftermarket stuff is notoriously junk and causes more grief that it's worth.
Erratic ESC warnings are a common sign of the fretting corrosion issue as previously stated. DeOxit connector cleaner is my go to stuff, less messy than grease.
 
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#6 ·
I have not used OEM parts. I've never had issues with non-OEM parts in any of my cars. However, I was prepared to buy a crankshaft position sensor one, but it seems replacing all that I did this weekend finally did the trick. No errors and so far no issues with the traction and esc warnings.

With that being said, seeing some oddity on the oil life thing, I'll monitor it for a few days and make another post if warranted.
 
#7 ·
Your finding out about the big box store parts with the "lifetime" warranty, you'll spend a lifetime changing them until ya get a good one, at least for a little while. OEM only for sensor or electronic parts is the rule for happy motoring....
 
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