I have a 2007 Acura RL with 141,000. I was driving entering on the highway and all of a sudden the SH-AWD, VSA, and ABS light came on. I finally had a chance to hook it up to my odb-II scanner and came up with error code P0847. My google of that code says that it is a Transmission fluid pressure sensor. It is odd because about 3 weeks ago I had the dealer do a transmission service on the car. Any idea what this could be? I checked all the fuses, the car still drives fine but only in FWD. Anyone know what this could be?

 

I think you answered your own question....transmission fluid pressure sensor. Check it out.

 

Obligatory "how old is the battery?" question.

 

My battery was replaced about a year ago. Don't think its the battery. I decided to try to reset my ecu by leaving the negative off the car for a minute and that didn't help. Might have to bring it to the stealership.

 

I also reset the codes after reading the initial p0847 and have been driving for over 1,000 miles and the code has not reappeared. So still baffled.

 

DTC P0847: Short in 3rd Clutch Transmission Fluid Pressure Switch Circuit, or 3rd Clutch Transmission Fluid Pressure Switch Stuck ON

NOTE:

• Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
• This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

 

So basically I need to replace the 3rd clutch pressure switch which at 141K sounds like a pretty normal replacement. I have that as part number 28610-RAY-003. I think the 4th clutch pressure switch is 28600-RAY-003. I am gonig to start there and see where it takes me.

Thanks,
Rpet

 

I had P0847 come up the other day. I had the 3rd gear solenoid switch replaced. Do we know if it's more common for the 3rd gear switch to need replacing? Do the other ones (I'm assuming there are ones for the other gears) flake out after awhile as well?

 

I know on the TL side, the 3rd and 4th pressure switches tend to take a dump.