A 2015 Ford Transit EcoBoost with a 3.5L engine experienced a no-start condition after running without issue. A diagnostic scan using FORScan revealed numerous Diagnostic Trouble Codes (DTCs) across various modules. This article analyzes these codes to pinpoint potential causes and guide troubleshooting for a 08 Ford Transit, as similar issues can occur across different model years. While the original scan was from a 2015 model, the information provided here applies generally to the 08 Ford Transit as well.
Understanding the DTCs on a 08 Ford Transit
The FORScan report highlighted several critical DTCs related to the fuel system and communication errors. Let’s break down the most significant codes:
Fuel System Related:
- P00C6 – Fuel Rail Pressure Too Low – Engine Cranking: This code, found in both the PCM (Powertrain Control Module) and OBDII module, indicates insufficient fuel pressure during engine cranking. This is a crucial starting condition and points towards a potential issue with the fuel pump, fuel pump relay, fuel pressure regulator, or clogged fuel filter. For an 08 Ford Transit, checking the fuel pump driver module (FPDM) is also recommended as it’s a common failure point.
- P025A – Fuel Pump Module A Control Circuit / Open: Detected in both the PCM and OBDII, this code suggests an open circuit in the control circuit of the fuel pump module. This could be due to a wiring issue, a faulty fuel pump relay, or a problem with the FPDM in an 08 model.
- U0109 – Lost Communication With Fuel Pump Control Module A: This PCM code indicates a communication breakdown between the PCM and the fuel pump control module. This further strengthens the suspicion of a problem within the fuel pump control circuit or the FPDM itself in a 08 Ford Transit.
- P0230 – Fuel Pump Primary Circuit: Found in the Body Control Module (BdyCM), this code reinforces the diagnosis of a fuel pump circuit issue. A short circuit or open circuit in the primary circuit could prevent the fuel pump from operating. Inspecting the wiring harness and related connectors for damage is crucial.
Communication Errors:
- U0100 – Lost Communication With ECM/PCM A: This code, present in multiple modules (ABS, RCM, IPC), suggests a loss of communication with the Engine Control Module/Powertrain Control Module (ECM/PCM). This can be caused by wiring problems, a faulty PCM, or issues with the CAN bus system. In an 08 Ford Transit, corroded connectors are a common culprit for communication errors.
- U0101 – Lost Communication with TCM: Found in the ABS and IPC modules, this code points to a communication failure with the Transmission Control Module (TCM). This might not directly relate to the no-start condition but should be addressed. Check the wiring and connectors between the TCM and other modules.
- U0422 – Invalid Data Received From Body Control Module: Detected in the ABS module, this code indicates that the ABS module is receiving incorrect information from the BdyCM. This could be related to a wiring issue or a fault within the BdyCM itself.
Troubleshooting the 08 Ford Transit No-Start
Based on the DTC analysis, the most likely cause of the no-start condition is a problem with the fuel system, specifically the fuel pump, its control circuit, or the FPDM (for an 08 model). The following steps are recommended for troubleshooting:
- Visually Inspect: Check all fuses and relays related to the fuel system. Inspect the wiring harness for damage, especially near the fuel pump and FPDM (if applicable). Look for loose or corroded connectors.
- Fuel Pressure Test: Perform a fuel pressure test to verify if the fuel pump is delivering adequate pressure. Low or no pressure confirms a fuel pump issue.
- FPDM Check (08 Ford Transit): For an 08 model, thoroughly inspect the FPDM for signs of water damage or corrosion. This is a known issue and often requires replacement.
- Electrical Tests: Use a multimeter to test the continuity of the fuel pump control circuit and related wiring. This will help identify any open circuits or shorts.
- Diagnostic Tools: Use a professional-grade scan tool to monitor live data from the fuel system and other modules. This can provide valuable insights into the system’s operation.
Addressing the communication errors will require further diagnostics focusing on wiring harnesses, connectors, and module integrity. Remember to consult the specific repair manual for your 08 Ford Transit for detailed procedures and wiring diagrams.
Conclusion
Diagnosing a no-start condition requires a systematic approach. By understanding the DTCs and performing targeted troubleshooting, you can effectively pinpoint the root cause and get your 08 Ford Transit back on the road. Remember safety first when working on your vehicle. If you are not comfortable performing these procedures yourself, consult a qualified mechanic.
