PACCAR Fault Code P3809: Heater Element PM Sensor – Voltage Too High or Short Circuit to Supply, High Side

Code details

Manufacturer

PACCAR (Kenworth & Peterbilt)

Applies to

PACCAR MX-13 (2017–2020)

Fault code

P3809

J1939 SPN

4360

FMI

4 — Voltage below normal, or shorted to low source

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 4 tells the shop the type of failure to test for: voltage below normal, or shorted to low source.
• 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 P3809 — Exhaust Gas Temperature Before SCR Catalyst – Voltage Too Low or Short Circuit to Ground
• PACCAR Fault Code P3808 — Exhaust Gas Temperature After SCR Catalyst – Data Valid But Too High, Least Severe
• PACCAR Fault Code P3810 — Heater Element PM Sensor – Voltage Too Low or Short Circuit to Ground, High Side
• PACCAR Fault Code P3816 — PM Sensor – Voltage Too High or Short Circuit to Supply
• PACCAR Fault Code P3825 — Sensor Circuit PM Sensor – Voltage Too Low or Short Circuit to Ground
• PACCAR Fault Code P3827 — PM Sensor Heater – Error, at Deactivation
• PACCAR Fault Code P3983 — Exhaust Gas Temperature After SCR Catalyst – Data Erratic, Intermittent or Incorrect
• PACCAR Fault Code P3808 — Exhaust Gas Temperature Before SCR Catalyst – Voltage Too High or Short Circuit to Supply