After I replaced the timing chain on my 2014 Accord it is still going into limp mode. I got my first scanner and the fuel pressure when slightly accelerating will pop up to 2000 for just a second and at the time the engine bucks(limp mode ?), then smooth's out at a much lower pressure. Yesterday I got a code for a EPS. Today I got 85-01. Any help would be appreciated.

Many months ago I found the timing was extremely loose when Auto Zone got code P0088 FP sensor high voltage, 83-11 PCM malfunction engine and 71-12 Open in seat sensor position sensor.

 

What will put a 9th generation Accord into limp mode?

 

I don't have a shop manual for the 2014 accord, but a quick web search for 85-01 is a problem with abs/traction control. I don't think that would put you into limp mode.


Is the fuel pressure still spiking at 2000 psi when accelerating? Do you have a function on the scanner to see if you are in limp mode?

 

I ran it in the driveway today. The fuel pressure stayed at 507 other than at times when accelerating when it jumps around a lot up to 2000. I am new to the scanner world. I was looking at total misfires and cylinder two had 8 of them while the rest were zero. I could feel them at idle when the scanner recorded them. I realize this is tiny but maybe it is a lead. At three thousand RPM the engine would miss like you hit the rev limit but didn’t record any misfires. The only code was for the Electric Power steering. I am waiting for a response from Foxwell on if the NT710 can tell if it is in limp mode.

On the 85-01 code doesn't traction control prevent the engine from accelerating like limp mode. Let me know if the miss is worth switching the coils packs to another cylinder.

 

You can try swapping coils to see if the misfire moves to a different cylinder. 8 counts is kind of low for a coil issue, but swapping coils is a quick test.

If you can scan the target fuel pressure on your scanner along with the actual fuel pressure, you can see if the HP fuel pump is behaving as commanded.

 

I moved the coil and spark plug to cylinder one. The
misfire moved to cylinder one on the scanner.

 

Hopefully replacing that coil will fix the issue. It will eliminate one issue if you have multiple and make diagnosis easier.

 

I changed the coil with a new Honda one. It didn't help but I got the code for the first time of cylinder one misfire. I changed the spark plug today and it has a crack along the length of the porcelain and now is running normal. The crack has a burn line. Only time will answer if this was the post timing chain issue.

 

Thanks for the update. Let us know if this ultimately solved the problem over time.

 

Check Engine light came on with a code for high voltage at ECM/PCM and two temporary codes of low volts. One code mention right rear and left front diff low voltage. I check the charging system and it is 15.5 at idle with the battery being new and fully charged. I don't understand what would cause over changing on a 9th generation Accord. I have not had the negative cable voltage sensor replaced yet. My local dealership has their system hacked and said to call them back at a later time. If there is a troubling shooting test for this that would help. Other than the check engine light the car runs perfect.