PACCAR Fault Code P3826: Exhaust Gas Temperature After SCR Catalyst – Data Valid But Too High, Moderately Severe

Code details

Manufacturer

PACCAR (Kenworth & Peterbilt)

Applies to

PACCAR MX-13 (2017–2020)

Fault code

P3826

J1939 SPN

4363

FMI

16 — Data valid but above normal range (moderately 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 16 tells the shop the type of failure to test for: data valid but above normal range (moderately 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 P3812 — Exhaust Gas Temperature After SCR Catalyst – Voltage Too High or Short Circuit to Supply
• PACCAR Fault Code P3813 — Exhaust Gas Temperature After SCR Catalyst – Voltage Too Low or Short Circuit to Ground
• PACCAR Fault Code P3814 — Exhaust Gas Temperature After SCR Catalyst – Data Erratic, Intermittent, or Incorrect
• PACCAR Fault Code P3817 — PM Sensor – Voltage Too Low or Short Circuit to Ground
• PACCAR Fault Code P3828 — PM Sensor Heater – Error, at Startup
• PACCAR Fault Code U113F — CAN Communication – Message (A1SCREGT) Out of Range, SCR Catalyst Outlet Gas Temperature From Aftertreatment System
• PACCAR Fault Code P3817 — Exhaust Gas Temperature After SCR Catalyst – Data Valid But Too High, Most Severe
• PACCAR Fault Code P3828 — Exhaust Gas Temperature After SCR Catalyst – Data Valid But Too High, Most Severe