P0841

DTC P0841: Abnormality in Line Pressure Sensor Function

DIAGNOSTIC FUNCTION

TCM conducts fault detection by comparing the target line pressure reading with the actual secondary pressure reading.

DESCRIPTIONS OF MONITOR METHODS

The actual secondary pressure reading is 0.675 MPa (98 psi) or more, and the status over the target line pressure remains for 5 seconds.

MONITOR EXECUTION

- transmission range:D
- Throttle valve opening : 1/8 or more
- Engine speed : 450 r/min or more
- CVT fluid temperature : from 20 to 180°C (68~356°F)

MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)

- Not applicable
Sensor (The sensor below is determined to be normal)

- Not applicable

LOGIC FLOW CHARTS (Monitor Sequence)





DTC SET CONDITIONS

Check Conditions

- Transmission range switch position: D.
- Throttle position sensor voltage: 1.37 volts or more.
- Engine speed: 450 r/min or more.
- Transmission fluid temperature: 20°C (68°F) or more.
- Transmission fluid temperature: 180°C (356°F) or less.
- Voltage of battery: 9 volts or more.
- Voltage of battery: 16 volts or less.
Judgment Criteria

- The actual secondary pressure reading is 0.675 MPa (98 psi) or more, and the status over the target line pressure remains for 5 seconds.

OBD-II DRIVE CYCLE PATTERN

transmission range: D (Drive the vehicle for 10 seconds or more while the accelerator opening angle is 20% or more)

PROBABLE CAUSES

- Abnormal line pressure
- Abnormality in secondary pressure sensor system
- Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. Check other diagnostic trouble codes.

Q. Are other diagnostic trouble codes set?

YES Go to the appropriate troubleshooting.
NO Go to Step 2.
STEP 2. Line pressure check

Carry out "hydraulic test" (Refer to Hydraulic Pressure Test).

Q. Is the check result normal?

YES Go to Step 3.
NO Repair according to the hydraulic pressure test diagnosis table.
STEP 3. Symptom recheck after erasing diagnostic trouble code

Q. Is the check result normal?

YES Intermittent malfunction
NO Replace TCM.