1999 honda accord 2.3L vtec F23A1

Hey guys, I just fixed a code for my vtec malfunction, and now I have some new codes to figure out. Here they are...

1. P0706 - Open in transmission range switch circuit

2. P1456 - EVAP emission control system leak detected (fuel tank system)

3. P0420 - Catalyst efficiency low-bank 1

4. P0430 - Catalyst efficiency low-bank2


Has anyone encountered any of these codes and can pass on some insight on how they fixed them? Also, for coes 3. and 4., I replaced bank 2 o2 sensor about 2-3 months ago and just replaced bank 1 o2 sensor the other day. I was only throwing the bank 1 o2 sensor code before this.

Any ideas??? Thanks guys in advance for any help.

 

bump

 

Clear them....be sure the gas cap is tight. Drive and see which codes come back.

Also, for a 4 cyl....bank 1 is all that should show up.....bank 2 is only for the 6 cyl.

 

96 honda accord lx 150,000 miles 4 cyl 4 door mechanic says the code shows I need fuel vapor vent pressure sensor, now he didn't seem to think I had to get fixed right away . He had just put in a ECM A week before. I did replace gas cap and took battery cables off to reset ECM, but light came back on. Will it hurt to wait to get fixed. Car drive good right now. Wasent sure this is where to put this question, if it's wrong ,sorry. In advance thanks for any help

 

So, I need to get the evap code fixed. Has anyone ever replaced the canister and 2 way valve, and is it hard to do?

 

I have always been suspicious of codes popping up after a fix.
If I were you, I would go back to the area/areas I was working on and verify that I did not knock/move/disconnect any component loose.

Something I have done twice now when working near the throttle body on my '95 and '97 is I have placed just enough pressure on a junction where a vacuum hose attaches to a vacuum line to cause the line to cut the hose. Nothing serious as it was part of the air intake baffle/resonator control assembly, but still I did not notice the issue until a later date when doing routine maintenance.

May be well worth it to just to a once over on all the electrical connectors and vacuum hoses in the region.