Code P0841

Tiny
BNORRIS1
  • MEMBER
  • 2013 NISSAN PATHFINDER
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 185,000 MILES
Transmission takes a few minutes before it will go in gear. Then shifts fine. Rough idling when in park. Mass air flow sensor and 2 O2 sensors have been replaced due to earlier codes that were shown.
Saturday, September 28th, 2019 AT 8:56 AM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,087 POSTS
Hello,

The P0841 code is for the Transmission Fluid Pressure Sensor/Switch "A" Circuit. Lets start by checking that out and replacing the sensor. But first have you checked the fluid level? Here is the location of the sensor, lets fix this problem fist to see if the rough idle goes away as well. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Sunday, September 29th, 2019 AT 12:06 PM
Tiny
BNORRIS1
  • MEMBER
  • 3 POSTS
We have replaced the spark plugs, replaced a vacuum hose that was damaged and another small hose/tube that was damaged. All hesitation is gone and it runs much better. The check engine light is off now. But when it is in Park and you shift to either Reverse or Drive, it takes a few seconds for the transmission to engage. Could this be the Transmission Fluid Replacement Sensor needing to be replaced or what?
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Sunday, October 6th, 2019 AT 8:24 AM
Tiny
BNORRIS1
  • MEMBER
  • 3 POSTS
Also, where do you purchase the sensor? We have checked the auto parts stores and no one has it.
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Sunday, October 6th, 2019 AT 10:04 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,965 POSTS
To be sure there is a problem you would want to scan the system to see if there are any codes stored. There are codes that do not turn on the check engine light but can still be there.
The switch will likely be a dealer only part as each of the sensors are programmed into the system, however the Jatco JF017E transmission you have does have known failure issues relating to internal hydraulic pressure issues that require the entire transmission be replaced. There is a re-programming that a dealer can do, if it hasn't been done already, that might help in some situations.
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Wednesday, October 9th, 2019 AT 12:34 PM

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