P1818 — Buick
P1818 — Buick: TFP Valve Position Switch Drive Without Drive Ratio
Code breakdown
P — System
Powertrain (engine, transmission, fuel & emissions)
1 — Type
Manufacturer-specific
8 — Subsystem
Transmission
Manufacturer-specific meanings (Buick)
- TFP Valve Position Switch Drive Without Drive Ratio
- Pressure Control Solenoid 2 Electrical