| PAB | Passenger Air Bag |
| PADS | Passenger Airbag Disarm Switch |
| PAG | PolyAlkylene Glycol |
| PAH | Polycyclic Aromatic Hydrocarbons |
| PAIR | Pulsed Secondary Air Injection |
| PAO | PolyAlphaOlefin |
| PAS | Power Assisted Steering |
| PASE | Passive Start and Entry system |
| PASS | Passenger |
| PATS | Passive Anti-Theft System |
| PB | Power Brakes |
| PBA | PolyButene Amine |
| PC | Pressure Control |
| PCB | PolyChlorinated Biphenyl |
| PCFV | Partnership for Cleaner Fuels and Vehicles |
| PCM | Power Control Module |
| PCM | Powertrain Control Module |
| PCMO | Passenger Car Motor Oil |
| PCS | Pre-Crash Sensor |
| PCS | Pressure Control Solenoid |
| PCTFE | PolyChloroTriFluoroEthylene |
| PCV | Positive Crankcase Ventilation |
| PDA | Premium Diesel Additive |
| PDC | Park Distance Control |
| PDS | Product Data Sheet |
| PDSC | Pressure Differential Scanning Calorimetry |
| PE | PentaErythritol |
| PEA | PolyEther Amine |
| PFI | Port Fuel Injection |
| PFPE | PerFluoroalkylPolyEther |
| PHEV | Plug-in Hybrid Electric Vehicle |
| PIB | PolyIsoButylene |
| PIBA | PIBamine |
| PIBSA | PolyIsoButyl Succinic Anhydride |
| PKE | Passive Keyless Entry |
| PM | Pensky-Martin |
| PMA | PolyMethAcrylate |
| P/N | Part Number |
| PNA | PolyNuclear Aromatic |
| PO | Propylene Oxide |
| POE | Polyolester |
| PPD | Pour Point Depressant |
| ppm | parts per million |
| PPO | PolyPhthalamide |
| PPS | Passenger Presence Sensor |
| PROM | Programmable Read Only Memory |
| PS | Power Steering |
| PSA | Peugeot – Citroen SA Group |
| psi | Pounds Per Square Inch |
| PSOM | Programmable Speedometer/Odometer Module |
| PTB | Pounds per 1000 Barrels |
| PTF | Power Transmission Fluid |
| PTFE | PolyTetraFluoroEthylene |
| PUL | Premium Unleaded Gasoline |
| PVL | Permanent Viscosity Loss |
| PWR | Power |
| PZEV | Partial Zero Emitting Vehicle |
