Question about 2010 Honda Civic LX

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Transmission po843 code 2nd clutch transmission pressure switch location

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Posted on Jan 02, 2017

ZiggynSC09
  • 79 Answers

SOURCE: I got the code P0847

Does it have any shifting problems? Hard shift or slipping? If not you may just need the 3rd clutch pressure switch. It will need to come from Honda I don't know pricing but I would think less then $100 and shouldn't take long to replace.

Posted on May 25, 2010

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P1775 code in showing up on my 2008 jeep wrangler x. How do you fix that?


we can not answer what you can do or fix.
only how to diagnose, or is this just a please guess for me post?
got tools, got a real scan tool?
is this a 5 buck code reader that misses most codes.
or a real one (ask for good tools)
if a real tool, it will show all codes, and you must know them all
or go astray. P0841? present? too>?

42RLE box.::: one code only, my guess.

i have this car, (m/t) and full FSM, on it,
Ill decode this and tell you what page to read in the FSM
it shows what to do next and the tests to prove this out.
P= power train
P1 means factory code ( so dont read ford codes)
SOLENOID SWITCH VALVE LATCHED IN TCC POSITION
TCC means torque converter clutch. lock up device. failure.
that means transmission, (id didnt say its bad)
the transmission on your car is automatic, unlike my stick
it has a TCM brain, hidden in the PCM brain
but its real and there. for sure. inside.
and it shifts for you, this brain,. in DRIVE

here is the 1st page on this code. in fsm book.

The Solenoid Switch Valve, an internal, hydraulically operated valve, controls the direction of the transmission
fluid when the LR solenoid is energized. When the solenoid switch valve is in the downshifted position and the
LR solenoid is energized, fluid is directed to the LR element for 1st gear. When the solenoid switch valve is In
the up-shifted position (2nd, 3rd, and 4th gear) and the LR solenoid is energized, fluid is directed into the
Lockup Switch Valve which controls the Torque Converter Clutch. When shifting into 1st gear, a special
sequence is followed to insure solenoid switch valve movement into the downshifted position. The LR pressure
switch is monitored to confirm switch valve movement. If the solenoid switch valve movement is not confirmed
(i.e. no LR pressure when the LR solenoid is energized), 2nd gear is substituted for 1st. No 1st gear (2nd gear is
substituted). The transmission Torque converter FEMCC operation is inhibited. MIL on after 5 min. of
substituted operation.
Monitor Conditions
When Monitored:
Prior to a shift into 1st gear.
possible causes:
RELATED DTC P0841 PRESENT?
(T16) TRANSMISSION CONTROL OUTPUT CIRCUIT OPEN
(T50) L/R PRESSURE SWITCH SENSE CIRCUIT OPEN
(T50) L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
(T50) L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
INTERNAL TRANSMISSION
POWERTRAIN CONTROL MODULE

the book says have the dealer
do a full transmission check using there (unique) fancy tool..
seems to be good advice.

below is the interface tcm.<> box.
solenoid and read back switches.
if the trans is not bad, then this switch is bad (fibbing)
or the wires rusty there... re-seat them yet?


25790628-45ach20vyw31nj2wu4lwuewn-5-0.jpg

Jul 20, 2015 | Jeep Cars & Trucks

1 Answer

Sensor circuit replaced and the defect still shows po843,what could be causing this reading?


A pressure switch is stuck off or damaged wire and computer thinks it's off.

Jan 19, 2015 | Honda Legend Cars & Trucks

1 Answer

Honda stream 2009 'D' blinking light. diagnostic says po843 code


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

Feb 04, 2014 | Honda Cars & Trucks

1 Answer

Diagnostic code: P0843 what is it?


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

Dec 14, 2013 | 2004 Honda Civic

1 Answer

I have a 97 Chevy tahoe and the auto transmission switches fine from 1st to 2nd but when it goes to switch to 3rd, then it goes into a neutral like mode and the rpms shoot up. Could it be a solenoid or 3rd...


It could be either. It could also be a result of sticking valve body spool valves. You need to scan your Powertrain Control Module for fault codes. If there is an electrical problem with a solenoid or a solenoid circuit, then there will be a CIRCUIT fault code present. If it is being caused by worn-out clutches or sticking valve body valves, there wil be "LONG SHIFT" or "MAXIMUM ADAPT" fault codes present, indicating a MECHANICAL problem. If thyere is a mechanical problem indicated, then pressure testing should be done. If there is an electrical fault indicated, then electrical diagnosis should be performed to locate the cause.

Sep 11, 2011 | 1997 Chevrolet Tahoe

1 Answer

1997 Chev. Z-28 Camaro shifts from 2nd to neutral sometimes, other times it does it from 3rd to 4th. Also won't downshift from 4th to 2nd in drive. trouble code 1870 appears, transmission has been rebuilt...


code p 1870 refers to transmission component slipping
the transmission may need clutch and band adjustment or a pump pressure test check as it may not be producing enough pressure to keep components in place

Jul 13, 2017 | 1997 Chevrolet Camaro

1 Answer

While driving home in my 2004 Trailblazer it stopped driving while it was in Drive. I would press the gas and the engine would just revved.


MANY THINGS WILL CAUSE NO DRIVE PROBLEMS.IF TRANSMISSION FLUID LEVEL CORRECT LEVEL AND TRANSMISSION FILTER BEEN CHANGED.SINCE TRANSMISSION PCM CONTROLLED SCAN FOR FOR TRANSMISSION FLUID PRESSURE SWITCH CODE.OR TRANSMISSION PRESSURE CONTROL SOLENOID FAULT CODE.LOOK FOR SHIFT SOLENOIDS FAULT CODES.LOOK FOR TRANSMISSION CONTROL MODULE FAULT CODE AND TRANSMISSION RANGE SWITCH FAULT CODE.IF NO CODES COME UP.YOU HAVE TRANSMISSION INTERNAL MECHANICAL FAILURE LIKE FORWARD CLUTCH AND INPUT CLUTCH HAS WORN DRIVE PLATES AND LEAKING PISTON SEALS.FAULTY TRANSMISSION OIL PUMP.HAVE TRANSMISSION PRESSURE TESTED.

Dec 31, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Code # 0843 Code # PO335


po843 is a hydraulic pressure valve in the transmission,that will have to be replaced.The code po335 is crankshaft position sensor a circuit malfunction.The sensor could be at fault here.

Mar 29, 2010 | 2002 GMC Sierra 2500HD

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