Hello All,
About a year ago, I posted a thread related to my 2010 Accord 2.4 having longer warm starts seemingly after replacing a failing oe starter with an aftermarket one. As some had said then, the aftermarket starter could be the culprit. Well, fast forward a year later, and I finally
think I've pinned the issue down. A couple weeks ago, a warm start was excessively long, and it triggered both the VSA light as well as the CEL. It even exhibited drivability issues as I could not go over 60 mph without it hesitating. At any rate, I did get it home, let it cool down, and it started right back up but now with the CEL blinking. I checked the codes, and P0339 (crank angle sensor signal intermittent) was stored and P0302 (cylinder misfire) was pending. I cleared the codes and thought maybe I need to do some research. I found several people who were having a similar issue all related to an aftermarket starter. So I thought I would conduct a little experiment. I located a rebuilt Mitsuba oe starter and did the job again. I was hopeful this would do the trick. It started fine, idled smooth, and seemed normal. However, the CEL was blinking again, and when I stepped on the gas, the engine was rough. After checking the codes, P0339 was now in permanent status and P0302 was again pending. This seems like a bona fide case of a bad crank angle sensor, which I am going to replace. My questions at this point are the following: 1) has anyone done the relearn without a scanner (there is a procedure in the service manual, but I wanted to see if anyone has ever done it)? 2) I'm assuming there really isn't a cylinder misfire, and the issue is the crank angle sensor itself. My question here is if the CAS is malfunctioning, can it throw off the ignition enough that unburned fuel is getting past the piston rings and into the oil. I did smell the oil on the dipstick after changing the starter, and it seemed fine. Any thoughts would be greatly appreciated,
Thanks in advance,
Mark

 

Since you have a pending P0302, you could have an issue with the ignition coil. A quick test is swapping the coil on cylinder 2 over to cylinder 4. See if you get a P0304 pending.

The P0339 requires a scanner to access some ckp sensor output. Do you have a scanner that can see ckp noise? I've never had to do a senor relearn. Does your scanner have this option? There is also a procedure for doing the relearn without a scanner.

Some of the steps are to check electrical connectors. I'd start with checking the connector to the CKP sensor for obvious corrosion, loose pins, or damaged wiring.

 

Thanks PAhonda, I will give what you suggest a try,