Powertrain, generic · Transmission

P0975 Shift Solenoid B Control Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Range/performance fault in the drive circuit of shift solenoid B. Three documented uses differ widely. GM's 2007 Allison 1000 table used it for an open SS2 circuit, confirmed by an intrusive low-side test (400 ms, Type A). FCA's 2016 recall for the 9-speed front-drive transaxle (Cherokee, 200, Renegade, 500X, ProMaster City) names P0975 with P0978, P0981 and P0984 as the codes set by intermittent high resistance from poorly crimped terminals in the range sensor harness under old TCM software; updated software reports that case as P0901 instead. Ferrari's DCT uses P0975 for a missing actuator 2 position signal. Low/high are P0976/P0977.

Likely causes

Poorly crimped terminals causing intermittent high resistance (FCA 9-speed recall)
Open or high-resistance coil of shift solenoid B
Outdated transmission software that misreads harness resistance
Faulty driver stage in the transmission control module

Symptoms

  • MIL or transmission warning on
  • Unexpected shift to neutral or loss of drive (FCA 9-speed)
  • Fixed default gear or harsh shifts

Repair estimate

DifficultyHardWorkshop job
Parts and labour€0–1,500
Time0.5–5 h

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

Parts involved

shift solenoid bwiring harnesstcm

Related codes

P097BP0976P0977P0755P0901P0978

References: gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov.