DTC P0841: Abnormality in Line Pressure Sensor Function

DIAGNOSTIC FUNCTION

DESCRIPTIONS OF MONITOR METHODS

• The pulley ratio range is from 0.5 to 1, and the relationship between the actual primary and secondary pressures shown as the pulley ratio is below 0.5 or above 1.
  

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)

• Not applicable
  

• Not applicable
  

LOGIC FLOW CHARTS (Monitor Sequence)

DTC SET 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.
  

• Actual primary pressure [pulley ratio (primary pulley ratio/secondary pulley ratio): more than 0.5 and less than 1]: lower limit of primary pressure. (5 seconds)
  
• Actual primary pressure [pulley ratio (primary pulley ratio/secondary pulley ratio): more than 0.5 and less than 1]: upper limit of primary pressure. (5 seconds)
  

OBD-II DRIVE CYCLE PATTERN

PROBABLE CAUSES

• Abnormal line pressure
  
• Abnormality in primary pressure sensor system
  
• Abnormality in secondary pressure sensor system
  
• Malfunction of TCM
  

	Go to the appropriate troubleshooting.

	Go to Step 2.

(Refer to Data List Reference Table .)

	Intermittent malfunction

	Go to Step 3.

Carry out "hydraulic test" (Refer to ).

	Go to Step 4.

	Repair according to the hydraulic pressure test diagnosis table.

	Intermittent malfunction

	Replace TCM.