PACCAR (Kenworth & Peterbilt)
PACCAR fault code
SPN 132 / FMI 16
PACCAR Fault Code P171E: Air Mass Flow – Data Valid But Too High
P171E on PACCAR (Kenworth & Peterbilt) engines means: Air Mass Flow – Data Valid But Too High. The failure mode (FMI 16) is “data valid but above normal range (moderately severe)”.
Code details
- Manufacturer
- PACCAR (Kenworth & Peterbilt)
- Applies to
- PACCAR MX-13 (2013–2016)
- Fault code
- P171E
- J1939 SPN
- 132
- 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.
Get this code diagnosed
Send one request and nearby diesel shops and mobile mechanics can quote the repair.
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Related fault codes
- PACCAR Fault Code P103A — PTO Main Switch – Data Erratic, Intermittent or Incorrect
- PACCAR Fault Code P1048 — Air Mass Flow – Data Valid But Too High, During Overrun
- PACCAR Fault Code P1049 — Air Mass Flow – Data Valid But Too Low During Overrun
- International Fault Code SPN 132 FMI 0 — Engine Inlet Air Mass Flow Rate High
- International Fault Code SPN 132 FMI 1 — Engine Inlet Air Mass Flow Rate Low
- International Fault Code SPN 132 FMI 11 — MAF Sensor Calibration – Insufficient Number of Data Points
- International Fault Code SPN 132 FMI 13 — MAF Sensor – Calibration Needed
- International Fault Code SPN 132 FMI 14 — MAF Sensor – Calibration Failed
Source: PACCAR MX-13 2013–2016 fault code list (Diesel Laptops). See also OBD-II codes.