Powertrain, generic · Transmission

P08BF Pressure Control Solenoid L Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Points to an open control circuit of pressure control solenoid L: the module sees no load where the coil should be. No manufacturer documents this code publicly; Toyota, the only known user of letter L, has published just P08BA71. GM's open-load test for the analogous solenoid M (P08C8) shows the method: with the low-side driver switched off, the coil should pull the sense pin up to battery voltage; if the driver chip can hold it between roughly 1.7 and 3 V with a tiny current, the circuit is open. Confirmation takes 150 ms. P08C1 and P08C2 are the short to ground and short to power. Typical results are a fallback gear and the warning light.

Likely causes

Connector loose, unplugged or corroded
Broken wire in the internal or external harness
Solenoid coil burnt open

Symptoms

  • Check engine light on
  • Transmission in fallback gear

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,500
Time0.5–4 h

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

Parts involved

pressure control solenoid lwiring harness

Related codes

P08BAP08C0P08C1P08C2P08C8

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