Need help !!
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Joined: Sep 2013
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Need help !!
Hi everybody... I have a dodge Dakota 2008+...
I have a problem with the transmission...
I plug a diag... And i get the error code po732 and po841...
I was going to buy a new automtic gear box...
But now I'm not sure if i should buy sensor before...
I have only 34000 miles...
Your opinion ?
Ty
I have a problem with the transmission...
I plug a diag... And i get the error code po732 and po841...
I was going to buy a new automtic gear box...
But now I'm not sure if i should buy sensor before...
I have only 34000 miles...
Your opinion ?
Ty
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Joined: Jul 2011
Posts: 3,053
Likes: 28
From: Mopar HQ
No opinion - just information from the factory service manual (2008 ND - 3.7L):
P0732-GEAR RATIO ERROR IN 2ND
Theory of Operation
The transmission system uses two speed sensors, one to measure input rpm and one to measure output rpm. These inputs are essential for proper transmission operation. Therefore, the integrity of this data is verified through data checks. When in gear, if the gear ratio does not compare to a known gear ratio, the corresponding gear ratio error trouble code is set. The transmission will go into Limp-in mode after four gear ratio error events occur in a given driving cycle.
When Monitored:
The Transmission gear ratio is monitored continuously while the transmission is in gear.
Set Condition:
If the ratio of the Input rpm to the Output rpm does not match the current gear ratio when compared to the known gear ratio.
Possible Causes
RELATED TRANSMISSION DTCS PRESENT
INPUT OR OUTPUT SPEED SENSOR ERRORS
TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY
INTERMITTENT GEAR RATIO ERRORS
INTERNAL TRANSMISSION
P0841-LR PRESSURE SWITCH RATIONALITY
Theory of Operation
The Transmission system uses three pressure switches to monitor the fluid pressure in the LR, 2/4, and OD elements. The pressure switches are continuously monitored for the correct states in each gear. If a set condition is identified, 1st gear and torque converter lock-up (EMCC) will be inhibited. The vehicle will launch in 2nd gear and shift normally through the gears without allowing EMCC. If during the same key start, the set condition is no longer valid, the transmission will return to normal operation (1st and EMCC available). Limp-in will not occur unless DTC P0841 is accompanied by a code P0706 and the MIL will illuminate after five minutes of substituted operation.
When Monitored:
Whenever the engine is running.
Set Condition:
The DTC is set if one of the pressure switches are open or closed at the wrong time in a given gear. If the problem is identified for 3 successive key starts, the transmission will go into Limp-in mode and the MIL will turn on after 10 seconds of vehicle operation.
Possible Causes
RELATED TCM POWER INPUT DTCS
LOSS OF PRIME DTC PRESENT
(T50) L/R PRESSURE SIGNAL CIRCUIT OPEN
(T50) L/R PRESSURE SIGNAL CIRCUIT SHORT TO GROUND
(T50) L/R PRESSURE SIGNAL CIRCUIT SHORT TO VOLTAGE
TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY
POWERTRAIN CONTROL MODULE
P0732-GEAR RATIO ERROR IN 2ND
Theory of Operation
The transmission system uses two speed sensors, one to measure input rpm and one to measure output rpm. These inputs are essential for proper transmission operation. Therefore, the integrity of this data is verified through data checks. When in gear, if the gear ratio does not compare to a known gear ratio, the corresponding gear ratio error trouble code is set. The transmission will go into Limp-in mode after four gear ratio error events occur in a given driving cycle.
When Monitored:
The Transmission gear ratio is monitored continuously while the transmission is in gear.
Set Condition:
If the ratio of the Input rpm to the Output rpm does not match the current gear ratio when compared to the known gear ratio.
Possible Causes
RELATED TRANSMISSION DTCS PRESENT
INPUT OR OUTPUT SPEED SENSOR ERRORS
TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY
INTERMITTENT GEAR RATIO ERRORS
INTERNAL TRANSMISSION
P0841-LR PRESSURE SWITCH RATIONALITY
Theory of Operation
The Transmission system uses three pressure switches to monitor the fluid pressure in the LR, 2/4, and OD elements. The pressure switches are continuously monitored for the correct states in each gear. If a set condition is identified, 1st gear and torque converter lock-up (EMCC) will be inhibited. The vehicle will launch in 2nd gear and shift normally through the gears without allowing EMCC. If during the same key start, the set condition is no longer valid, the transmission will return to normal operation (1st and EMCC available). Limp-in will not occur unless DTC P0841 is accompanied by a code P0706 and the MIL will illuminate after five minutes of substituted operation.
When Monitored:
Whenever the engine is running.
Set Condition:
The DTC is set if one of the pressure switches are open or closed at the wrong time in a given gear. If the problem is identified for 3 successive key starts, the transmission will go into Limp-in mode and the MIL will turn on after 10 seconds of vehicle operation.
Possible Causes
RELATED TCM POWER INPUT DTCS
LOSS OF PRIME DTC PRESENT
(T50) L/R PRESSURE SIGNAL CIRCUIT OPEN
(T50) L/R PRESSURE SIGNAL CIRCUIT SHORT TO GROUND
(T50) L/R PRESSURE SIGNAL CIRCUIT SHORT TO VOLTAGE
TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY
POWERTRAIN CONTROL MODULE