The Power Steering Control Module (PSCM) plays a crucial role in the electronic power steering system of a Ford F-150. This article delves into troubleshooting a recurring power steering issue on a 2016 F-150 Platinum 4×4 3.5L EcoBoost, focusing on potential Pscm Ford related problems. The truck experienced intermittent steering sticking, followed by complete power steering failure and associated fault codes.
Understanding the Problem: Steering Assist Fault and PSCM Ford
Initially, the F-150 exhibited steering stickiness at the top or center, veering left or right during lane changes. This progressed to violent jerking and total power steering loss, accompanied by fault codes including “Steering Assist Fault,” “Lane Keeping Sys Malfunction,” and “Hill Decent Control Fault.” Diagnostic codes revealed a U3000:49 Internal Electronic Failure within the PSCM Ford module, with an elevated internal temperature of 102 degrees Fahrenheit.
Initial Repair Attempt: Replacing the Steering Rack
A new aftermarket steering rack was installed, ensuring compatibility with the truck’s specifications. The original PSCM Ford module’s AS BUILT configuration was downloaded and programmed into the new rack. A wheel alignment was performed. Following the repair, the truck functioned flawlessly on a long trip. However, the power steering failed again without warning during a subsequent trip. The same U3000:49 code reappeared, along with a new code: B1D23 Overheat Sensor. The PSCM Ford internal temperature had risen to 131 degrees Fahrenheit.
Exploring Potential Causes Beyond the Steering Rack
Before replacing the steering rack again, it’s crucial to investigate potential contributing factors. Could another system be overloading the steering system or causing the PSCM Ford to overheat? Possible culprits include:
-
Electrical System Issues: A faulty alternator or wiring harness could lead to voltage fluctuations or excessive current draw, stressing the PSCM and steering rack.
-
Cooling System Problems: Insufficient cooling of the PSCM Ford module due to a malfunctioning cooling fan or restricted airflow could contribute to overheating.
-
Software or Calibration Issues: Although the PSCM Ford was reprogrammed with the original AS BUILT data, there might be compatibility issues with the aftermarket steering rack or a need for a software update.
Conclusion: Further Diagnosis is Necessary
While a faulty steering rack is a plausible cause, the recurring PSCM Ford internal failure and overheating point to a potential underlying issue. Thoroughly inspecting the electrical system, cooling system, and verifying software compatibility are crucial steps before replacing the rack again. Addressing these potential root causes will increase the likelihood of a permanent fix.
