Powertrain, generic (extended)

P27C5 Pressure Control Solenoid P Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P27C5 reports an open control circuit on solenoid P. GM's Corvette dual-clutch table 23OBDG07 tests synchronizer actuation valve 3 for this while its low-side driver (a TLE8242 chip) is off: an intact coil pulls the sense pin up towards battery voltage, whereas without a load the driver manages to hold it in a window of about 1.7 to 3.0 V. If that persists for 150 ms after the output has been off for over 5 ms, the code sets as Type A, with battery voltage 8.75-18 V and no P0882/P0883 present; 24OBDG07 retains it. Ford's 2024 table lists open load of SPV3 on the TR9070 as P27C5. Look for a broken wire, an unplugged connector or an open coil.

Likely causes

Open winding in solenoid P
Connector not latched or pin pushed back
Broken control wire between TCM and solenoid

Symptoms

  • MIL on immediately
  • Shifts on rods 3 and 4 in A-to-B direction not possible
  • Limp mode with restricted gears

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–900
Time1–4 h

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

Parts involved

pressure control solenoid pwiring harness

Related codes

P27C3P27C6P27C7P27C8P27CDP27BD

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