Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2009F450 SUPER DUTY 2D CAB CHASSIS EXTRA CAB, 6.4 R, 4WD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - PINPOINT TESTS - 6.4L 99R DIESEL -- F250-F550 SUPER DUTYPINPOINT TEST AA: POWERTRAIN CONTROL MODULE (PCM) READ O1NLY MEMORY (ROM) FAILURETEST PROCEDURE
2009 Ford F450 Super Duty 2D Cab Chassis Extra Cab, 6.4 R, 4WD, Standard
Test Procedure
2009 Ford F450 Super Duty 2D Cab Chassis Extra Cab, 6.4 R, 4WD, StandardSECTION Test Procedure
- AA1 DIAGNOSTIC TROUBLE CODE (DTC) P0605: PRELIMINARY DIAGNOSIS
- Key ON, engine OFF.
- Carry out the KOEO self-test.
Is DTC P0605 present?
Yes No GO to AA2. Unable to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the concern. REPAIR as necessary. REFER to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX , if a driveability concern exists. - AA2 PROGRAM THE PCM
- Program the PCM. Refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .
- Clear the DTCs.
- Carry out the KOEO self-test.
Is DTC P0605 present?
Yes No GO to AA3. The test is complete. - AA3 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test and verify the concern is still present.
Is the concern still present?
Yes No INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.