Hi all. I wanted to provide as much info as possible, so this ended up being a long post. I’m feeling really stuck and can’t “take it into the shop” in the traditional sense, so I deeply appreciate you if you make it to the end.
We have a 2016 Jeep Renegade Limited with just under 25k miles. I’m in Alaska and don’t live on the road system - it came on a cargo plane. We do have an auto shop here that sometimes has a mechanic, but there is not one there now and it could be months or more until we have one again. That being said, I do know a few people that are much handier than I am and could help with many things…my own knowledge on the other hand is pretty limited. We bought the car in July and it’s been great until now. We bought it at a dealership but actually had a chance to get in touch with the previous owner, and she said there were no issues she was aware of, she just wanted something different.
So onto the problem… a few weeks ago the engine wouldn’t turn over. Luckily I have an ODBII scanner and plugged it in. It gave me the P0340 and P0335 codes for the camshaft sensor and crankshaft sensor. I ordered them both, waited, and discovered that the camshaft sensor was the wrong one and didn’t fit. I replaced the crankshaft sensor and it started right away! It felt pretty good to be able to fix it.
Fast forward about 4 days, and it wouldn’t start again. I plugged in the ODBII scanner, and no codes at all this time. I unplugged the battery for about 20-30 minutes to reset the computer, and still had the same issue - no turning over and no codes. I decided to order the correct camshaft sensor. It arrived today, I replaced the old one, and it didn’t change anything. No turning over and a check engine light with no codes.
Another thing to mention is that before I replaced either sensor, the check engine light would turn on, blink for a little, and then go back to solid. After I got it going the first time (with replacing just the crankshaft sensor), there was no check engine light at all until it stopped turning over again. At this point it is doing the same thing as before: solid, blinks a little, solid. This is obviously with just having the car on, not fully started. I know a blinking light can mean a misfire, but I’m not sure how to determine that or what is causing it, especially since it was fine for a few days.
A few other things that may be worth mentioning…It’s already below freezing here, but I do have a block heater. I also have a trickle charger that has been able to charge up the battery no problem. A few weeks before the issue started, there was some gurgling from the muffler. My friend said it was likely the water byproduct in the catalytic converter and that it hadn’t gotten hot enough for it all to evaporate. Drives tend to be shorter here - maybe as short as 5 minutes total, plus warmup time. It’s a small village but big enough for tons of folks to have a car here. So I suppose there could be more water than normal collecting in there. This is probably a stretch, but I wonder if the water froze and is blocking the exhaust from actually leaving.
I appreciate any thoughts or ideas! Thanks so much for reading all of this!