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 MANUALSFORD2018F-450 SUPER DUTY LARIAT, 4D PICKUP CREW CAB, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEMODE 6 - 2017-18 FORD - DIESELCOMPREHENSIVE COMPONENT MONITOR - TRANSMISSIONTRANSMISSION CONTROL MODULE (TCM)
2018 Ford F-450 Super Duty Lariat, 4D Pickup Crew Cab, 4WD
Transmission Control Module (TCM)
2018 Ford F-450 Super Duty Lariat, 4D Pickup Crew Cab, 4WDSECTION Transmission Control Module (TCM)
TCM
| DTCs | P0604 - RAM fault present P0605 - ROM fault present P0607 - CPU reset fault P06B8 - NVRAM error |
| Monitor Execution | Once per driving cycle at start-up except reset monitoring which is continuous |
| Monitor Sequence | None |
ADLER (CHIP THAT CONTROLS THE TRANSMISSION SOLENOIDS)
| DTCs | P1636 - lost communication (over internal SPI network) with ADLER chip |
| Monitor Execution | Electrical - Continuous |
| Monitor Sequence | Transmission enters mechanical limp home (get P, R, N and 5M with open TCC and max line) if the main micro cannot communicate with the ADLER chip |
TRANSMISSION ID (TRID) BLOCK (CONTAINS SOLENOID CHARACTERIZATION DATA
| DTCs | P163E - Programming error (checksum fault) P163F - TRID data not programmed |
| Monitoring Execution | Start-up - TRID is a portion of flash memory, either it is present at start-up or not |
| Monitor Sequence | Transmission solenoid data missing, enters limited operating mode (P, R, N and 3rd gear with open TCC). |
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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.