PACCAR Fault Code P104E: Exhaust Gas Pressure Before Turbine – Data Valid But Too Low, During Engine Braking

Code details

Manufacturer

PACCAR (Kenworth & Peterbilt)

Applies to

PACCAR MX-13 (2013–2016)

Fault code

P104E

J1939 SPN

2795

FMI

1 — Data valid but below normal operating range (most severe)

Truck models in source

Kenworth T680, T880, W900, T800; Peterbilt 579, 389, 567, 367

What to do next

• Read active and inactive codes with the OEM service tool and note the occurrence count.
• FMI 1 tells the shop the type of failure to test for: data valid but below normal operating range (most severe).
• Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.

Related fault codes

• PACCAR Fault Code P2563 — VTG Turbocharger Actuator Position – NO or Too Slow Movement
• PACCAR Fault Code U1160 — VTG Turbocharger Actuator Control – Data Erratic, Intermittent or Incorrect
• PACCAR Fault Code U1409 — VTG Turbocharger Actuator State – Data Erratic, Intermittent or Incorrect
• PACCAR Fault Code U140A — VTG Turbocharger Actuator Effort – Data Erratic, Intermittent or Incorrect
• PACCAR Fault Code P1727 — VTG Turbocharger Control – Data Erratic, Intermittent or Incorrect
• PACCAR Fault Code U1408 — VTG Turbocharger Actuator Status – Data Erratic, Intermittent or Incorrect