PACCAR Fault Code P2229: Internal ECU Ambient Pressure – Malfunction

Code details

Manufacturer

PACCAR (Kenworth & Peterbilt)

Applies to

PACCAR MX-13 (2017–2020)

Fault code

P2229

J1939 SPN

108

FMI

3 — Voltage above normal, or shorted to high 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 3 tells the shop the type of failure to test for: voltage above normal, or shorted to high 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 P2226 — Internal ECU Ambient Pressure – Data Erratic, Intermittent or Incorrect, at Ignition ON
• PACCAR Fault Code P2228 — Internal ECU Ambient Pressure – Malfunction
• Cummins Fault Code 221 — Ambient Air Pressure Sensor Circuit – shorted high
• Cummins Fault Code 222 — Ambient Air Pressure Sensor Circuit – shorted low
• Cummins Fault Code 295 — Ambient Air Pressure Sensor Circuit - data incorrect
• International Fault Code SPN 108 FMI 2 — BARO Signal – Erratic, Intermittent or Incorrect
• International Fault Code SPN 108 FMI 3 — BARO Signal – Out of Range HIGH
• International Fault Code SPN 108 FMI 4 — BARO Signal – Out of Range LOW