The Ford P1E is a powertrain control module (PCM) used in early 1990s Ford diesel and gasoline vehicles such as the 7.3L IDI engines in F‑150 trucks. Common failures on this unit include solder joint fatigue on the main PCB, cracked or corroded connectors to sensor harnesses, and intermittent communication with the engine control bus due to voltage spikes or grounding issues. Initial troubleshooting should verify proper power (12 V at the module’s Vcc pins) and ground integrity, inspect all wiring harness connections for corrosion or damage, and read stored DTCs via a compatible OBD‑II scanner to isolate sensor or actuator faults before proceeding with board-level diagnostics.[oss-gpt-20b]