ProTech Auto Systems is your trustworthy supplier of all ECM, PCM, and ECU PY9W-18-881, PYAS-18-8K2B & PYAE-18-8K2B Auto Computers. These devices monitor the fuel, air, and electrical aspects of a PY9W-18-881, PYAS-18-8K2B & PYAE-18-8K2B engine to ensure optimal engine performance. When an auto computer becomes impaired, that is where ProTech Auto Systems steps in.