Powertrain, generic · Transmission

P0819 Up and Down Shift Switch to Transmission Range Correlation

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0819 is the plausibility check between the tap-up and tap-down switches and the range sensor: a shift request may only appear in the manual gate or in drive. If a tap switch reports in P, R or N, or taps arrive without the manual gate being detected, the correlation is broken. GM's 2019 tables and Ford's 2012 SelectShift run exactly this check but assign the fault to the switch concerned as P0815 or P0816; no manufacturer with its own P0819 is documented. Manual shifting would be disabled while automatic operation stays normal, without the MIL. Causes are a sticking tap switch, a misadjusted range sensor or selector cable, or the selector wiring.

Likely causes

Tap switch sticking or faulty
Range sensor or selector sensor misadjusted or faulty
Selector cable misadjusted
Selector wiring or connectors

Symptoms

  • Tap or manual mode not working
  • Range display partly wrong
  • No check engine lamp

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–600
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

tap shift switchtransmission range sensorgear selectortransmission control module

Related codes

P0815P0816P0826P0705P0706

References: newtonnet.co.uk, gsi.ext.gm.com, law.cornell.edu.