Pressure Control Solenoid B Performance or Stuck Off

Pressure control solenoid B performance on Nissan CVTs controls secondary pulley pressure. Performance faults indicate solenoid wear or contaminated CVT fluid. Nissan CVTs are extremely sensitive to fluid condition -- change the CVT fluid every 30K miles using the genuine Nissan fluid your year specifies -- NS-2 on earlier units, NS-3 from roughly the early 2010s. If the code persists after a fluid change, the solenoid requires replacement inside the valve body. Check for steel belt debris in the fluid. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.

PCS-B performance on the 6L80E regulates clutch apply pressure. Performance faults cause harsh shifts or shift flares. Check fluid condition and level first. If fluid is clean, the PCS-B solenoid or its valve body bore is worn. GM recommends replacing the solenoid and inspecting the bore for scoring. If scored, a valve body replacement or Sonnax bore repair kit is needed.

The ZF 8HP 8-speed uses electrically controlled pressure regulators. PCS-B performance faults on the ZF 8HP are caused by solenoid contamination or valve body wear. The ZF 8HP valve body (mechatronic unit) is a sealed assembly -- individual solenoid replacement is not recommended. Replace the mechatronic unit as a complete assembly. Always use ZF LifeGuard 8 fluid.