99 Ford F350 7.3L Diesel Hard Shifting: Fixing P0472, P0237, P0475, P1247, and P0470 Codes - DIY Solution
Hello! I recently purchased a 1999 Ford F350 7.3L diesel dually and am experiencing hard shifting issues. After taking it to a transmission shop, they retrieved stored diagnostic trouble codes (DTCs) that were previously cleared — suggesting the issue may have been intentionally reset. The technician explained that resolving these codes should fix the shifting problem. The codes I received are: - P0472: Exhaust Pressure Sensor Low - P0237: Turbocharger Boost Sensor A Circuit Low - P0475: Exhaust Pressure Control Valve Malfunction - P1247: Turbo Boost Pressure Low - P0470: Exhaust Pressure Sensor Malfunction I contacted the dealer, but they refused to provide specific diagnosis or repair guidance over the phone. I'm looking for a clear, cost-effective DIY solution — preferably involving simple parts that can be replaced at home. Since I work on Audi, VW, and Porsche vehicles daily, I’m confident in my mechanical skills and don’t typically rely on dealerships. My last F350 had over 400,000 miles with no issues until now. I suspect this is a relatively simple fix — possibly under $100 or less. Can anyone confirm which parts need to be replaced to resolve these codes? I’d like to avoid expensive dealership visits and unnecessary repairs.
For reference, Ford's official trouble code database lists the following explanations: - P0470: Exhaust Pressure Sensor Malfunction - P0472: Exhaust Pressure Sensor Low - P0475: Exhaust Pressure Control Valve Malfunction - P0237: Turbocharger Boost Sensor A Circuit Low - P1247: Turbo Boost Pressure Low (this is a known Ford-specific code related to turbo pressure) I noticed that codes in the 1000 range are manufacturer-specific. In Ford's case, similar issues like P1237 relate to fuel pump problems — but P1247 specifically points to low turbo boost pressure. This helps clarify what each code means. The key takeaway: multiple codes point to exhaust pressure and turbo system faults. I suspect the root cause is either a faulty sensor or wiring issue in that system.