Powertrain, generic (extended)

P2819 Pressure Control Solenoid H Electrical

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2819 is a collective electrical code for solenoid H: the module knows that coil or wiring is faulty but does not say whether the circuit is open or shorted. Mercedes-Benz uses it on the 8G-DCT dual-clutch gearbox (transmission 724.1 in the A-Class, CLA and GLA/GLB families): P281900, an electrical fault of pressure regulating valve 8, is one of the codes its guided diagnosis tool in XENTRY handles, alongside P281600 for a functional fault of the same valve. GM, by contrast, reports H circuit faults as separate codes P281B, P281D and P281E. CARB 13 CCR 1968.2 requires transmission output circuits to be checked for such faults. Measure coil resistance and the connection to the module before replacing the valve or the mechatronic unit.

Likely causes

Coil of valve H open or shorted
Poor contact between valve and mechatronic or module board
Damaged transmission wiring or connector

Symptoms

  • MIL or transmission warning on
  • Limp-home mode with restricted gears
  • Jerky starts or rough shifts

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–3,000
Time1–6 h

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

Parts involved

pressure control solenoid htcmtransmission wiring

Related codes

P2816P281BP281DP281EP2810

References: static.nhtsa.gov, law.cornell.edu, gsi.ext.gm.com.