This Cummins VP44 fault code document is a 3-page diagnostic PDF for Fault Code 264 on ISB CM550 applications. It explains the VP44 fuel temperature sensor error, the ECM or fuel pump control module response, sensor range limits, checks with a diagnostic tool, and final code clearing steps.
Official Cummins VP44 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB CM550 (1990-94) |
| System/Group | DTCs; VP44 Fuel Pump; VP44 fuel temperature sensor |
| Publication no. | Not shown in extract |
| Year/Revision | Unknown; copyright notice 2017 shown in document extract |
| Pages | 3 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- FAULT CODE: 264
- PID: P0181
- SPN: 174
- FMI: 2
- VP44 FUEL TEMPERATURE SENSOR ERROR
- VP44 Fuel Pump
- DESCRIPTION
- COMPONENT LOCATION
- TROUBLESHOOTING STEPS
- Step 1A) Turn key switch ON and check to see if the fault code is active at engine start-up
- Step 2A) Turn key switch ON and verify the sensor accuracy
- Step 3A) Turn key switch OFF and check for the possible causes of high fuel temperature
- Step 4A) Connect all components and turn key switch ON. Disable the fault code
- Step 4B) Connect all components and turn key switch ON. Clear the inactive fault codes
Applicable truck models
This file applies to Cummins ISB CM550 (1990-94) diagnostic troubleshooting for Fault Code 264. The extract identifies the VP44 fuel pump and the Bosch fuel pump control module, with the circuit for this fault contained within that module. It does not list specific truck chassis, engine ratings, or model-year limits beyond the ISB CM550 group reference. For factory brand information, visit the Cummins official website.
Who needs this Cummins VP44 fault code manual
Workshop technicians, diesel mechanics, and fleet maintenance staff need this VP44 fault code manual when diagnosing Fault Code 264, PID P0181, SPN 174, FMI 2. The procedure supports checks for unrealistic fuel temperature readings, a default 75°C [167°F] value, high fuel temperature causes, and remaining active fault codes before replacing other parts.
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