My check engine light came on driving home:

Car seems to run fine
I used a paperclip to get it to flash the code, which came up 72
I assume 72 means : P0072 Ambient Air Temperature Sensor Circuit Low Input


Any ideas?

Anyone seen this code before?

Thanks,

James

 

7 long flashes and 2 quick flashes = 72 ("Cylinder 2 Misfire")

If you have 72, change spark plugs, check coils

you can only get P codes thru an OBD2 scanner. get a OBD2 scanner and check what code you are throwing!

you may get these codes from that if you got 72 by jumping the plug with the paperclip

P0302 No. 2 Cylinder Misfire
or
P0300 Random Misfire

 

Thanks, I will replace/check those and head over to autozone to see if there are any other codes being thrown.

 

Went to Advanced and the only code was P0302, so I guess that is good.

I couldn't find any place around that had the spark plugs in stock.
Does anyone know of a parts/retail store that keeps them in stock?

After reading the Misfire thread by negcamber I wonder if it has anything to do with me putting a few gallons of mid grade at a sketchy gas station and then topping off with premium once I got out of the country?

I picked up some Sea Foam while I was out, is that recommended to use? Can it cause any harm to the car?

Any advantage to taking it to Honda to get the plugs replaced over doing it myself? (I think they have a 4-cyl "tune up" with plugs for $50)

Thanks,
James

 

good to see you got the code checked out.

DO NOT USE SEAFOAM!!!!! Some people like it, i have never seen anything but issues when used, so i don't recomend it at all.

autozone/kragen/auto parts store should have the plugs. Or just buy them at Honda. MUST use the proper plugs...

NGK PFR7G-11S

NGK IFR7G-11KS

 

Very few places other than the dealer have them in stock. The copper NGK ZFR7F-11 work fine as well, though they need to be changed at least 2x as often. The car will run fine with them, and at $2 apiece it's a cheaper way to test out new plugs if that's not the issue.

I also agree- Seafoam is crap. It works to remove carbon, but so does sand. As mentioned it can cause more issues than it fixes.

 

I found the plugs at NAPA and picked up a digital torque wrench at Northern Tools.

Also I skipped the Seafoam.

Coil Packs were brown near the spark plugs.

Plugs were dirty and white near the tip.

I put the new ones in and torqued to 18.

Reset the ECU and let it idle for 5 minutes, then drove for a little over 10 miles with no issues and no CEL yet.

Pictures to come.

1. Are the brown coil pack ends a concern?

2. Should I re-torque the plugs to 21 instead of the 18 I did?

3. Do I need to take the plugs out and put anti-seize on them?

4. Anything else I need to do or check?

Thanks,
James