Powertrain, generic · Transmission

P08C2 Pressure Control Solenoid L Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Reports a control circuit voltage of pressure control solenoid L that is too high, typically a short to battery voltage or to a neighbouring output. No manufacturer documents this code publicly; Toyota, the one documented user of letter L, has published only P08BA71. GM's equivalent for solenoid M (P08CB) uses two tests: with the low-side driver on, a sense voltage above 0.7 to 1.1 V, depending on supply voltage, means a short to power; at shutdown each output is also switched on in turn to detect a short to a neighbouring output, which is then stored and reported at the next start. A shorted valve usually cannot be switched off. P08C1 is the low counterpart, P08BF the open circuit.

Likely causes

Control wire shorted to battery voltage
Short between adjacent solenoid wires in the internal harness
Defective output stage in the transmission control module

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

P08BFP08C0P08C1P08CB

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