Powertrain, generic · Transmission

P0954 Auto Shift Manual Control Circuit Intermittent

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The manual up/down request signal drops out or flickers for short moments, so a single tap may arrive twice, late or not at all. Unlike P0952 and P0953 the voltage is not stuck outside its window; it jumps between states without a matching lever movement. Typical triggers are loose pins in the shifter connector, worn contacts or a harness that flexes with the lever. A Chrysler patent shows how simple contact switches in the gate signal each request, a Volkswagen patent how Hall tip sensors and their lines are checked. No manufacturer documents this exact code publicly; CARB requires circuit checks. P0950 is the general fault. The driver notices missed or doubled manual shifts.

Likely causes

Loose or spread pins in the selector lever connector
Harness broken internally where it moves with the lever or steering column
Worn or oxidised tip switch contacts

Symptoms

  • Manual shifts occasionally ignored or executed twice
  • Fault comes and goes, often over bumps
  • Manual mode temporarily switched off

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–450
Time0.5–3 h

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

Parts involved

auto shift manual switchwiring harnesstcm

Related codes

P0950P0951P0952P0953P0959

References: law.cornell.edu, patents.google.com, patents.google.com.