P0843 HONDA CEVIC 2013 - 2009 Honda Civic

Question edited for clarity.
Question moved to model category.

You have parasitic draw, but disconnecting the fuse box is not the way to find it. This is

https://www.fixya.com/cars/r29903527-parasitic_draw_car_batteries

Repair manual

https://www.google.com/search?q=2013+honda+crv+repair+manual+pdf

Best Plan here

https://www.google.com/search?q=mobile+auto+electrician+near+me

..

For all kind of manuals. You can also visit this website.They offer 100% satisfaction guarantee.
https://big-manuals.com/products/2009-honda-civic-service-repair-manual

American Honda is recalling 270 2013 Honda Pilot and Honda Odyssey vehicles because a worn piston may suddenly fail, causing the engine to stall. No related component failures, crashes or injuries have been reported, the company said. The recall is expected to begin on September 16.Sep 10, 2013

take it in, get it fixed ? stream?) not sold here, so alldata.com has nada.
or if DIY person
RTM , read the manual the FSM. its all there, look up 843
it tells you all the tests to do , that isolates the true cause of failure.

D flash means the tranny TCM is unhappy.
the CEL glowing too.
the P0843 means.
Data:
P0843: Open in Transmission Fluid Pressure Switch A (2nd Clutch) Circuit, or Transmission Fluid Pressure Switch A (2nd Clutch) Stuck OFF

first google hit.
http://www.civicforums.com/forums/181-8th-9th-gen/351431-engine-ligh-flashing-d-p0843-what-do-next.html#post4616790

On this website, you find fuse box description for Honda Civic (2013)

http://www.autogenius.info/honda-civic-2013-fuse-box-diagram

P0843 Open in 2nd Clutch Transmission Fluid Pressure Switch Circuit, or 2nd Clutch Transmission
Fluid Pressure Switch Stuck OFF

OBD2 codes,
D flash is in the operators guide, it says, bad tranny.
lost the guide? ive posted it 100 times now. the link, need it?

obd2 is easy P0xx codes are USA FED, spec codes ( a standard)

google is really your friend, 1st hit , bingo,

http://www.civicforums.com/forums/181-8th-9th-gen/351431-engine-ligh-flashing-d-p0843-what-do-next.html

overwhelmed, ? yes, A/Ts are on the extreme complex side.

ask any ASE badged mechanic, for help.
the dealer will be (stealerships) like $6000 fix, 1/2 tranny and 1/2labor.
btw 1:
if tranny slips dont drive it, or the costs to fix rise fast.

as you can see, it can be
1: bad wires.
2: bad sensor.
3: bad transmission.
only testing finds the cause, and wire inspections and maybe new sensor and pray.

what skinflints do (or just smart) is reset it (OBD2 scan tool reset) and see if it comes back , praying its a 1 time ever error. this decade.
see>? this is true with all DTC'S, reset and pray.
or in the case of 455s tighten the gas cap,reset and pray.

DTCS are errors. (onboard, diagnostic monitor errors)

code p0843 refers to transmission fluid pressure (TFP) sensor A --high input===causes --wiring ---short to positive --TFP sensor---ECM/TCM
replace the sensor .

Hi there:
This is a Powertrain fault code, DTC P0843 - Transmission Fluid Pressure Sensor/Switch "A" Circuit High


Generally this could be some gear pressure switch located behind the transmission was broke. Other details in THIS LINK.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

try the Internet you will find numerous adverts for code finding on radio's you might need the serial number off your set to get a code for it. other than that go to your local auto spark and they might be able to help you.