This bulletin applies to 2016-2017 Acura MDX, 2017 NSX, 2014-2017 RLX Sport Hybrid and 2015-2017 TLX vehicles. You may experience multiple indicators on, or the transmission won’t go into gear, and the MIL is on with DTC P263C (internal control module transmission range sensor performance).
There may be debris in the Reverse or Neutral shift buttons of the shift by wire (SBW) shifter assembly that’s causing them to stick. Typical debris are particles in the shift button or sticky residue from something that spilled. Check for debris. Particles can be removed with tweezers or a vacuum. Sticky residue can be cleaned with a clean cloth dampened with fresh water. Avoid using liquids, chemicals or pressurized air that could damage the buttons.
If you don’t find any debris, with the engine off, work each shift button one at a time. If any shift button is hard to press, slow to return or does not fully return, replace the SBW shifter assembly. If all shift buttons appear to work, clear the DTC, start the engine and with the parking brake set and brake pedal depressed, work the Park, Reverse, Neutral and Drive buttons one at a time, waiting 15 seconds between each gear change. Repeat this three more times and wait for two minutes before shutting the engine off. If the DTC does not reset and the transmission shifts normally, you’re done. If the DTC resets and the transmission does not shift normally, replace the SBW shifter assembly.
