Powertrain, generic · Transmission

P07D1 Transmission Mode Switch E Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Transmission mode switches select alternative shift programs such as sport, winter or tow/haul; the J2012 family runs from A (P071A–P071C) and B (P071D–P071F) to C (base code P078F), D and E. No manufacturer document available to us uses switches C to E; GM reads its analog mode switch under its own codes (low below 21–29 % of 5 V, high from 94 %, two trips) and newer drive mode selectors under P05D0–P05D3. P07D1 is the general circuit fault of a fifth mode switch E: its state is invalid or implausible. Low and high are P07D2/P07D3.

Likely causes

Switch or button faulty or sticking
Wire or connector open or shorted
Moisture or dirt in the console
Control module

Symptoms

  • Mode E cannot be selected or stays active
  • Mode indicator missing or flashing
  • Transmission stays on the normal program

Repair estimate

DifficultyEasyDIY possible
Parts and labour€30–300
Time0.3–1.5 h

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

Parts involved

transmission mode switchswitch wiringtransmission control module

Related codes

P07D2P07D3P07CEP078FP05D0

References: law.cornell.edu, gsi.ext.gm.com, gsi.ext.gm.com.