Last week when I scanned the engine, it threw two ABS codes, one of which is code number 31-2, which says "Engine Retard Command (PFINH) Signal Failure"

and it further displays the following:

"POSSIBLE FAILURES
- control line open
- control line short
- solenoid valve failure"

The other code number is 61-1 (Battery voltage failure), and it went on to say that possible failures are battery failure and AC generator failure.

But I didn't have much time then, so I just trickle charged the battery overtime hoping code 61-1 could go away.

Then today, both the TCS and the Check Engine Light are on. I was wondering how to fix it. Just replace the solenoid? Your inputs are appreciated!

Thanks for reading.

 

What kind of scanner pulled those codes? Can you please use an OBD2 scanner to pull the Cxxxx and Pxxxx codes?

 

Thanks for the reply. I used an Xtool D8S scanner. I'll use another one to pull the c and p codes instead.

 

Used a $20 scanner and obtained a P0131 (O2 Sensor Circuit Low voltage bank 1 sensor 1) code.
When I cleared the code and tried to start the engine, immediately the engine experienced some misfire, both the TCS and Check Engine lights came on, and the scanner returned the following codes:

P0300 (random/multiple cylinder misfire detected)
P1399 (please refer to vehicle service manual)
P0301 (cylinder 1 misfire detected)
P0302 (cylinder 2 misfire detected)
P0304 (cylinder 4 misfire detected)
P0306 (cylinder 6 misfire detected)

I replaced all spark plugs with exactly the same spark plugs specified in the owner's manual two years ago, and both brake fluid and PS fluid was flushed a year ago, and replaced engine oil and the coolant with the Acura blue coolant a month ago. Also, I cleaned the PCV valve two months ago. The car was in top shape before this. So I thought it can't be the engine and checked the battery, which is good, 100% charged, and its CCA stays above the CCA level printed on the label. What I did next was I took the clock fuse off in the fuse box on the passenger side and put it back on. Afterwards, I started the engine, and this time the engine had a little reluctance initially but it started nonetheless, and both the TCS and the Check Engine lights were off. I decided to let engine run a few more minutes and observed that the RPM was in good idle range 700-ish. I will need to scan it again sometime today and try to figure out what in the hell had happened. Any suggestions are appreciated.

 

Unfortunately, Honda's misfire math is often wrong. So a bad coil on any cylinder can be reported as misfires on other cylinders. The next step is to run a manual load balance test. With the engine running, unplug the connector from each ignition coil, one at a time. If the engine RPM drops when you unplug a coil, that coil is probably good. If the engine RPM does not drop when you unplug a coil, that coil is bad.