OBD-II code · Powertrain (generic)
P085F Up and Down Shift Switch Circuit Range/Performance
The up/down shift switch reports a range/performance fault. Manual shift requests via paddle or selector cannot be reliably interpreted.
Is it safe to drive with P085F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySwitch contacts aged
- PossibleHigh-resistance contact
- Less likelySensor element aged beyond calibration window
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Up Down Shift Switch, Wiring Harness, Tcm
Related codes
- P085CGear Shift Control Module B Communication Circuit High
- P085DGear Shift Control Module A Performance
- P085EGear Shift Control Module B Performance
- P0860Gear Shift Control Module A Communication Circuit
- P0861Gear Shift Control Module A Communication Circuit Low
- P0862Gear Shift Control Module A Communication Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.