- Allison Transmission 3000 4000 P0843
- P0843 Honda Accord
- Honda Civic P0843
- P0843 Honda Code
- P0843 Honda Cr-v
Error Code P0843 is a generic trouble code, meaning it applies to all vehicles with the OBD-II system, especially those made from 1996 up to present. This includes vehicles from, but not limited to, Acura, Chevrolet, Chrysler, Dodge, GMC, and Toyota. However, it seems to be more common among Honda vehicles.
- The OBD2 Code Information Be Applicable For Honda: 2013 Honda Urban SUV Concept,2013 Honda S660 Concept new,2013 Honda NSX-GT Concept,2013 Honda N-One,2013 Honda GEAR Concept,2013 Honda Civic,2013 Honda CR-Z,2012 Honda Civic,2011 Honda Jazz,2011 Honda Accord,2010 Honda Insight,2010 Honda CR-V,2009 Honda City,2008 Honda S2000,2008 Honda Accord,2007 Honda Fit,2007 Honda Civic,2007 Honda CR-V.
- Checking through different sources concerning P0843, some people have rough shifting associated with this, I don't. Now you've given me a clue with the ECU, by the way where is it located? Since I don't have the Honda data system, if I were to pull the cable and switch and try to test it manually, how would I go about that?
- Honda CR-V P0843 Code Meaning: When you check Honda CR-V car engine light came on code P0843 the reason should be. However manufacturer may have a different definition for the P0843 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.
DTC Troubleshooting: P0843 (25-4)
Allison Transmission 3000 4000 P0843
| DTC P0843: | Open in 2nd Clutch Transmission Fluid Pressure Switch Circuit, or 2nd Clutch Transmission Fluid Pressure Switch Stuck OFF |
NOTE:- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
| Clear the DTC with the HDS. |
| Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). |
| 7-position transmission: Shift to the 2 position. 5-position transmission: Shift to the S position, then select 2nd gear by pressing the steering wheel upshift (+) switch. |
P0843 Honda Accord
| Check the 2nd PRES SWITCH signal with the HDS in the A/T data list. Is the 2nd PRES SWITCH ON? YES - Go to 5. NO - Go to 7. |
Honda Civic P0843
| 7-position transmission: Drive the vehicle in the 2 position for more than 5 seconds, then shift to the D position, and drive in 3rd gear for more than 5 seconds. Slow down and stop the wheels. 5-position transmission: Drive the vehicle in 2nd gear in the S position for more than 5 seconds, then upshift to 3rd gear, and drive in 3rd gear for more than 5 seconds. Slow down and stop the wheels. |
| Monitor the OBD status for P0843 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. Does the result indicate FAILED? YES - Go to 7. NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the 2nd clutch transmission fluid pressure switch and the PCM. If the tester indicates NOT COMPLETED, return to 5 and recheck.n |
| Turn the ignition switch OFF. |
| Disconnect the 2nd clutch transmission fluid pressure switch connector. |
| Turn the ignition switch ON (II). |
| Measure voltage between 2nd clutch transmission fluid pressure switch connector terminal and body ground. Is there about 5 V? YES - Replace the 2nd clutch transmission fluid pressure switch, then go to 15. NO - Go to 11. |
| Turn the ignition switch OFF. |
| Jump the SCS line with the HDS. |
| Disconnect PCM connector B (44P). |
| Check for continuity between PCM connector terminal B8 and 2nd clutch transmission fluid pressure switch connector terminal. Is there continuity? YES - Check for loose or poor connections at PCM connector terminal B8. If the connection is OK, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.n NO - Repair open in the wire between PCM connector terminal B8 and the 2nd clutch transmission fluid pressure switch, then go to 15. |
| Clear the DTC with the HDS. |
| Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). |
P0843 Honda Code
| 7-position transmission: Drive the vehicle in the 2 position for more than 5 seconds, then shift to the D position, and drive in 3rd gear for more than 5 seconds. Slow down and stop the wheels. 5-position transmission: Drive the vehicle in 2nd gear in the S position for more than 5 seconds, then upshift to 3rd gear for more than 5 seconds. Slow down and stop the wheels. |
P0843 Honda Cr-v
| Monitor the OBD status for P0843 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. Does the result indicate PASSED? YES - Troubleshooting is complete.n NO - Return to 7 and recheck. |