7.3L Power Stroke Diagnostics (1999–2003 Super Duty)

Ford Super Duty and Excursion, 1999-2003 — the HEUI 7.3L: a high-pressure oil pump and IPR valve fire the injectors, a fixed-geometry Garrett turbo, glow plugs, and no emissions system. ICP/IPR, cam sensor, UVCH/glow-plug and injector-driver codes dominate.

Common symptoms

Engine Stalls or Dies, Often When Hot — 7.3 Power Stroke A 7.3L Power Stroke that dies while driving — often when hot — and then restarts is classically a failing camshaft position sensor; the tachometer dropping to…
Hard Start or Long Crank — 7.3 Power Stroke A diagnostic reference for a 7.3L Power Stroke (1999–2003) that cranks but takes a long time to start or is hard to start, especially when hot or cold. Focuses…
Loss of Power — 7.3 Power Stroke Diagnostic guide for 7.3 Power Stroke loss of power, low boost, no power symptoms.
Rough Idle and White Smoke on Cold Start — 7.3 Power Stroke A diagnostic reference for 1999–2003 7.3L Power Stroke trucks that idle rough and produce white smoke on cold start, with the symptom clearing as the engine…
Surging or Bucking — 7.3 Power Stroke Diagnostic reference for surging or bucking on 1999–2003 7.3L Power Stroke (HEUI).

P0236 — Turbocharger/Supercharger Boost Sensor A Circuit Range/Performance — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke (1999–2003) P0236.
P0237 — Turbocharger/Supercharger Boost Sensor A Circuit Low — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke (1999–2003) P0237.
P0238 — Turbocharger/Supercharger Boost Sensor A Circuit High — 7.3 Power Stroke P0238 Turbocharger/Supercharger Boost Sensor A Circuit High
P0381 — Glow Plug/Heater Indicator Circuit — 7.3 Power Stroke P0381 on the 7.3L Power Stroke indicates a fault in the glow plug wait-to-start indicator lamp circuit, not a glow plug heater performance failure. Diagnose…
P1184 — Engine Oil Temperature Sensor Out of Self-Test Range — 7.3 Power Stroke P1184 on the 7.3L Power Stroke is a Ford-enhanced self-test code for the engine oil temperature sensor. It sets when the PCM sees the EOT reading outside the…
P1282 — Excessive ICP Pressure — 7.3 Power Stroke Diagnostic guide for P1282 on 7.3L Power Stroke (1999-2003) HEUI system. Focuses on diagnosing excessive injection control pressure conditions without…
P1316 — Injector Circuit / IDM Codes Detected — 7.3 Power Stroke P1316 on the 7.3L Power Stroke means the PCM has seen injector-driver-module (IDM) stored faults. The IDM reports its own injector-circuit codes to the PCM…
P1393 — Glow Plug Circuit Low Input Bank 2 — 7.3 Power Stroke P1393 on a 7.3L Power Stroke means the PCM sees low current on the bank-2 glow-plug circuit. On this engine bank 2 is the driver side. The code points to an…
P1662 — IDM EN Circuit Failure — 7.3 Power Stroke IDM EN Circuit Failure
P1663 — FDCS Circuit Failure — 7.3 Power Stroke P1663 is a Ford-enhanced code for the 7.3L Power Stroke (1999–2003 Super Duty/Excursion). It indicates a fault in the fuel delivery command signal (FDCS)…
P0198 — Engine Oil Temperature Sensor Circuit High — 7.3 Power Stroke P0198 on a 7.3L Power Stroke means the PCM sees the engine oil temperature sensor signal voltage above its valid range. On this HEUI engine the EOT sensor…
P1247 — Turbo Boost Pressure Low — 7.3 Power Stroke Turbo Boost Pressure Low
P0117 — Engine Coolant Temperature Circuit Low Input — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke (1999-2003 Super Duty/Excursion).
P0118 — Engine Coolant Temperature Circuit High Input — 7.3 Power Stroke The PCM sees high voltage/low resistance on the ECT circuit, interpreting it as an extremely low coolant temperature. On the 7.3L Power Stroke the ECT is used…
P0197 — Engine Oil Temperature Sensor Circuit Low — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke 1999-2003 Super Duty/Excursion. HEUI injection uses engine oil pressure to fire injectors; there is no common rail…
P0219 — Engine Overspeed Condition — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke (1999–2003) when DTC P0219 is stored.
P0230 — Fuel Pump Primary Circuit — 7.3 Power Stroke Fuel Pump Primary Circuit
P0261 — Cylinder 1 Injector Circuit Low — 7.3 Power Stroke P0261 on a 7.3L Power Stroke (1999–2003 Super Duty/Excursion) means the PCM/IDM has detected low electrical current or voltage in the cylinder 1 injector…
P0262 — Cylinder 1 Injector Circuit High — 7.3 Power Stroke P0262 is a per-cylinder injector circuit fault on the 7.3L Power Stroke HEUI system. The PCM/IDM has detected abnormally high voltage/current in the cylinder 1…
P0341 — Camshaft Position Sensor A Circuit Range/Performance — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke 1999-2003 Super Duty/Excursion.
P0344 — Camshaft Position Sensor A Circuit Intermittent — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke (1999–2003) F-250/F-350/F-450/F-550 Super Duty and Excursion. The CMP sensor on the front cover is the only…
P0380 — Glow Plug/Heater Circuit Malfunction — 7.3 Power Stroke P0380 on the 7.3L Power Stroke 1999-2003 Super Duty/Excursion means the PCM has detected an electrical fault in the glow-plug heater circuit. The engine uses…
P0470 — Exhaust Pressure Sensor Malfunction — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke 1999-2003 Super Duty/Excursion. The 7.3L uses an Exhaust Back Pressure (EBP) sensor and regulator for cold-idle…
P0472 — Exhaust Pressure Sensor A Circuit Low — 7.3 Power Stroke P0472 means the PCM sees an abnormally low voltage from Exhaust Pressure Sensor A on a 7.3L Power Stroke 1999-2003. On this platform the EBP sensor and…
P0603 — Internal Control Module Keep Alive Memory Error — 7.3 Power Stroke The PCM detected an internal fault or loss of data in its keep-alive memory, which stores learned adaptations and settings when the ignition is off. On the…
P0605 — Internal Control Module Read Only Memory (ROM) Error — 7.3 Power Stroke P0605 indicates the PCM has detected an internal fault in its non-volatile memory (ROM) that prevents reliable operation of the engine control software. On the…
P1211 — ICP Pressure Above/Below Desired — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke (1999–2003) HEUI system. P1211 means injection control pressure (ICP) is above or below desired. Injection pressure…
P1280 — Injection Control Pressure (ICP) Circuit Out Of Range Low — 7.3 Power Stroke Injection Control Pressure (ICP) Circuit Out Of Range Low
P1281 — Injection Control Pressure (ICP) Circuit Out Of Range High — 7.3 Power Stroke Injection Control Pressure (ICP) Circuit Out Of Range High
P1283 — Injection Pressure Regulator (IPR) Circuit Failure — 7.3 Power Stroke Injection Pressure Regulator (IPR) Circuit Failure
P1391 — Glow Plug Circuit Low Input - Bank 1 — 7.3 Power Stroke Diagnostic reference for 7.3L Power Stroke 1999-2003 Super Duty/Excursion. Code indicates PCM sees low voltage/current on bank-1 glow-plug feedback circuit…
P1660 — Output Circuit Check Signal High — 7.3 Power Stroke P1660 is a Ford-enhanced code: the IDM output circuit check (OCC) signal to the PCM is reading high on the 1999–2003 7.3L Power Stroke.