honda civic ex 1.7

They told me that it can be the transmission switch range?

Honda 202 civic ex 118,000 miles, code # P0138
Fuel system faulty secondary HO2s12 short circuit,
RICH CONDITION ,heated oxygen sensor bank1 sensor 2 circuit high voltage
I,m aware of it maybe be, sensor to be replaced
the car did run slow and did stop all together during driving., and P1298 electric load detector and failed ECM I need to pass mass. inspection in march. Sould I take it to a honda dealer or a shop? $ What is your suggestion ?

oil then the check engine came on. i tested the cel and came back with two codes p1259 and then p0420 what sould i do next

What would cause transmission failure?

Dash and tail ights go out, and 15amp fuse is blowen at the box in engine compartment.

got the 0420 code, replaced the O2 sensors as well as the Catalytic converter. The CEL turns on after driving for about an hour (going through the drive cycle as well). The car has 195k miles and most of the parts are original except the motor itself that I purchased from a recycler not too long ago with an estimated 50k miles. Not sure which direction to take to troubleshoot. Registration is expired and need to find a solution. Any help would be appreciated, thank you.

The engine is a SOHC for the civic in my other question.

Installed new timing componets (all) along with front eng. mount. Customer
says now has a vibe @ idle but runs great! Looked at other mounts look ok.
It does vibrate very little but cant say it was not there before the work. In gear
holding brk. with throttle engine doesn't move in drive or rev. like another mount is bad. 377,000 mi. In drive it is better than rev. I want to blame a mtr. mount but just don't see it. Any ideas.

Suddenly, a few weeks ago, my automatic door locks stopped working - I must lock and unlock each door manually. And the dashboard constantly indicates my parking/emergency brake is engaged, even when I'm driving and it is 100% clear that it's not. Any idea what's going on? And is this going to cost me an arm and a leg to get repaired?

I hear a noise when I turn my wheel all the way to right. I never hear it when I turn all the left. Sometimes I can go weeks w/o hear but then it can creep for a day or two and go away again.

Car will not drive. Reverse forwrad

Why does the car sound non-exhaust loud?

I am considering buying a used Honda Civic 5-speed, yet am figuring in the cost of replacing the clutch and knowing at how many miles it should be changed. Thank you.

While I'm driving the car shakes and it has a flashing check engine light