DTC P0842

DTC P0842  : Transmission Fluid Pressure Switch A (2nd Clutch) Circuit Low/Transmission Fluid Pressure Sensor Circuit Low Input

NOTE:  Before you troubleshoot, review the General Troubleshooting Information .

DTC (Gear)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Check the parameter(s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   Oil pressure sensor 1 voltage	0.25 or less	V

   Do the current condition(s) match the threshold?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between the transmission fluid pressure sensor and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

2. Determine possible failure area (PODCL line, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Transmission fluid pressure sensor 3P connector

   -3. Turn the vehicle to the ON mode.

   -4. Check the parameter(s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   Oil pressure sensor 1 voltage	0.25 or less	V

   Do the current condition(s) match the threshold?

   YES 

   Go to step 3.

   NO 

   Go to step 4.

3. Shorted wire check (PODCL line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Disconnect the following connector.

   PCM connector E (80P)

   -4. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Transmission fluid pressure sensor 3P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	Transmission fluid pressure sensor 3P connector (female terminals) No. 2:
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there 1 MΩ or more?

   YES 

   The PODCL wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the original PCM .

   NO 

   Repair a short to ground in the PODCL wire between the transmission fluid pressure sensor and the PCM.

4. Open wire check (VCC2 line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Transmission fluid pressure sensor 3P connector: disconnected

   Test point 1	Transmission fluid pressure sensor 3P connector (female terminals) No. 3:
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there about 5 V?

   YES 

   The VCC2 wire is OK. Replace the transmission fluid pressure sensor .

   NO 

   Repair an open in the VCC2 wire between transmission fluid pressure sensor and the PCM.