Code Definition

P1178 — Boltup limits

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Ford

About P1178

P1178 is a manufacturer-specific powertrain diagnostic trouble code recorded for Ford vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1178 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This code applies to Ford diesel engines fitted with the Lucas EPIC rotary fuel injection pump, where the Powertrain Control Module compares the crankshaft position signal against the injection pump position sensor to confirm the pump is timed correctly to the engine. DTC P1178, described as a bolt up limits fault, sets when the pump timing relative to the engine falls outside the acceptable window. On these systems a timing error up to about 2 degrees is tolerated, an error between roughly 2 and 4 degrees logs this bolt up limit code, and a larger error sets a more serious timing fault. The u...

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