This is bizarre. So had the not too uncommon rodent chew through the yummy soy based wire cover of the knock sensor wire. Was lazy, knowing it wasn't a critical component so got around to having it replaced a couple months later. Vehicle drove as normal. A week before taking it in, when I was parked on a steep hill (sideways) I got a low oil warning. I do my oil myself. While at the shop (reputable Japanese independent) they mentioned they saw one other code besides the knock sensor, something about an actuator sticking on cylinder 0 or something. They said typically that was for low oil. I told them I had just ordered oil on Amazon so I could do the job myself and had them hold off on the oil change.
So they cleared all the stuff and said they "ran the computer through diagnostics" and he mentioned the "rough idle" was due to the low oil and I should put some in. I thought, hmm, hadn't ever noticed a significant rough idle? So when driving home, when coming to a stop the car was really idling rough periodically to the point the engine died twice in my driveway. WTF!? Nothing like this ever happened before taking the car in! So whatever they did, something during the process screwed it up. Could reseting everything in the computer cause it or could they have screwed something up on the knock sensor replacement? It's just basically an R&R of the intake manifold and they replaced all the gaskets.
I'm quite embarrassed to say I was 1.5 quarts low (that's what it took for the dipstick to register the oil -- was thinking back to my lecturing of girlfriends in the past about not checking their oil once in a while - duh.) But again, everything was running just fine up to the visit to the shop. In the past I've been an oil fanatic like a lot of people using Mobile 1 (5W-20) and replacing every 5,000 miles. After reading lots of info in the years past I went to 10K miles recently and stupid me didn't dawn on me I never had to check oil previously because I was replacing the oil twice as often and so more of a chance of burning more oil when replacing it much less often (and it was Castrol Full Synth, not their Extended I don't think.) The idle issue diminished 75% after putting oil in but I've only driven it 5 miles since adding the oil. This is a 2010 with only 67K miles! I guess it's pretty normal to burn 1.5 quarts in about 8000 miles on a full synth but not extended life oil.
The shop definitely did something to exacerbate the problem, which pretty much didn't exist before.
Hoping I'm not going to need a valve job or something and it just needs some more time for the oil to get the actuator fully lubed/ungunked or whatever. Will be doing a full oil change in a couple days. Mobile 1 Extended Life. I'm not using anything else anymore.
So they cleared all the stuff and said they "ran the computer through diagnostics" and he mentioned the "rough idle" was due to the low oil and I should put some in. I thought, hmm, hadn't ever noticed a significant rough idle? So when driving home, when coming to a stop the car was really idling rough periodically to the point the engine died twice in my driveway. WTF!? Nothing like this ever happened before taking the car in! So whatever they did, something during the process screwed it up. Could reseting everything in the computer cause it or could they have screwed something up on the knock sensor replacement? It's just basically an R&R of the intake manifold and they replaced all the gaskets.
I'm quite embarrassed to say I was 1.5 quarts low (that's what it took for the dipstick to register the oil -- was thinking back to my lecturing of girlfriends in the past about not checking their oil once in a while - duh.) But again, everything was running just fine up to the visit to the shop. In the past I've been an oil fanatic like a lot of people using Mobile 1 (5W-20) and replacing every 5,000 miles. After reading lots of info in the years past I went to 10K miles recently and stupid me didn't dawn on me I never had to check oil previously because I was replacing the oil twice as often and so more of a chance of burning more oil when replacing it much less often (and it was Castrol Full Synth, not their Extended I don't think.) The idle issue diminished 75% after putting oil in but I've only driven it 5 miles since adding the oil. This is a 2010 with only 67K miles! I guess it's pretty normal to burn 1.5 quarts in about 8000 miles on a full synth but not extended life oil.
The shop definitely did something to exacerbate the problem, which pretty much didn't exist before.
Hoping I'm not going to need a valve job or something and it just needs some more time for the oil to get the actuator fully lubed/ungunked or whatever. Will be doing a full oil change in a couple days. Mobile 1 Extended Life. I'm not using anything else anymore.
