Powertrain, generic · Transmission

P0962 Pressure Control Solenoid A Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Pressure control solenoid A circuit low: the driver sees a short to ground. Ford tests its line pressure (EPC) solenoid this way; a short there opens a high-side switch that cuts power to the shift solenoids and leaves park, reverse, neutral and one fixed forward gear at maximum line pressure. On GM's six-speeds and the Saab 9-4X 6T70, A is the line pressure solenoid; the fault matures in 1.5 to 2 s and is Type A, with reverse and 5th gear only, no converter lock-up and maximum line pressure. GM's 8-, 9- and 10-speeds use A for a clutch solenoid and treat less than 0.5 ohm as a short, Allison 1000 for main modulation pressure (125 ms). Siblings: P0960 open, P0963 high, P0961 performance.

Likely causes

Control wire chafed through and touching ground
Internally shorted solenoid coil
Transmission fluid or water in the connector bridging pins
Faulty output stage in the control module

Symptoms

  • MIL and transmission warning on immediately
  • Limp mode with only one forward gear and reverse
  • Harsh engagements, poor acceleration from standstill

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–1,800
Time1–5 h

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

Parts involved

pressure control solenoid awiring harnesstcm

Related codes

P0960P0961P0963P0966P0970P0747

References: saabwisonline.com, gsi.ext.gm.com, gsi.ext.gm.com, newtonnet.co.uk.