My Car:
1996 Accord LX, 4 cylinder vtec, manual.

A few days ago my check engine light popped on, and I got these codes:

P0430, P0420, P0705, P0706

Now, the first two are o2 sensor/ cat efficiency.
The second two are transmission range switch circuit issues.

I've been looking through the shop manual, hoping to find info on how to troubleshoot the range switch, but I can't find anything. Nor does an internet search yield much help with concern to my specific car/transmission. I can't even confirm that manual transmissions on my car have a range switch.

So three questions:

Do I have a range switch/ where can I find it?

If I don't have a range switch, what is this code talking about?

Could the errors all be related? They all popped up at the same time, and if the range switch tells the computer what gear I'm in, the emissions system may think its running less efficiently than it should be given a specific speed/gear. Or at least that's my thinking.

Thanks in advance

 

what ecu do you have? I am pretty confident that the P0705 and P0706 are NOT accurate codes for a 5 speed.

 

<EDIT> Scratch what I'd previously said, I had the wrong number. Its P0H.