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2018 RAM 3500
6.7L I6 Cummins•RWD•diesel•ISB•turbo
11 active safety recalls on this vehicle — view recalls
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Repairs0Labor515Torque136Fluid9DTC1795Battery1Maintenance0Recalls11
P0148high severityPowertrain

Fuel Delivery Error

on 2018 Ram 3500 6.7L I6 Cummins · RWD

What this code means

The PCM detects that actual fuel delivery does not match the commanded amount. This is common on diesel and high-pressure fuel systems where delivery is monitored closely.

Symptoms

  • Hard starting
  • Poor engine performance
  • Illuminated check engine light

Common causes

  • Faulty fuel pump
  • Clogged fuel filter
  • Fuel pressure regulator fault
  • Wiring or connector problems

Diagnostic steps

  1. Scan for stored codes and freeze frame
  2. Check fuel pressure with a gauge
  3. Inspect fuel filter and lines for restriction
  4. Test fuel pump and regulator operation
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Other Powertrain codes on this vehicle

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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