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DTC Confirmation Procedure:
Confirm that battery voltage is between 11 and 14 V before performing the following procedures.
Turn ignition switch to LOCK.
Connect X-431 3G diagnostic tester (the latest software) to Data Link Connector (DLC), and make it
communicate with vehicle electronic module by the data network.
Turn ignition switch to ON.
Using X-431 3G diagnostic tester to record and clear the DTCs stored in the TCU.
Turn ignition switch to LOCK and wait for a few seconds.
Turn ignition switch to ON, and then select "Read Code".
If DTC is detected, the malfunction indicated by the DTC is current. Go to the diagnosis procedure - Step 1.
If DTC is not detected, the malfunction indicated by the DTC is intermittent. Please refer to Intermittent
DTC Troubleshooting.
Diagnosis Procedure
HINT:
After the fault is eliminated, verify DTC and symptom again.
a. Turn ignition switch to LOCK.
b. Disconnect the primary shaft pressure sensor connector.
c. Check if the primary shaft pressure sensor connector is dirty, oxidized, loose or damaged.
DTC Code
DTC Definition
DTC Detection
Condition
DTC Set
Condition
Possible Cause
P0842
Transmission Fluid
Pressure Sensor 'A'
Circuit Low
Start engine and wait
for at least 10 seconds
The transmission
fluid pressure
sensor 'A' oil
pressure is less
than the
allowable min
value
Transmission fluid
pressure sensor 'A'
failure
Signal circuit open
or short circuit
TCU signal circuit
failure
P0843
Transmission Fluid
Pressure Sensor 'A'
Circuit High
The transmission
fluid pressure
sensor 'A' oil
pressure is more
than the
allowable max
value
1
Check wire harness connector
Repair fault
NG
OK