PACCAR (Kenworth & Peterbilt)
PACCAR fault code
SPN 188 / FMI 2
PACCAR Fault Code P1565: Idle Speed – Differs From the Target Idle Speed
P1565 on PACCAR (Kenworth & Peterbilt) engines means: Idle Speed – Differs From the Target Idle Speed. The failure mode (FMI 2) is “data erratic, intermittent or incorrect”.
Code details
- Manufacturer
- PACCAR (Kenworth & Peterbilt)
- Applies to
- PACCAR MX-13 (2017–2020)
- Fault code
- P1565
- J1939 SPN
- 188
- FMI
- 2 — Data erratic, intermittent or incorrect
- 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 2 tells the shop the type of failure to test for: data erratic, intermittent or incorrect.
- 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
- International Fault Code SPN 188 FMI 0 — Engine Unable to Achieve Desired Idle Speed (Too High)
- International Fault Code SPN 188 FMI 1 — Engine Unable to Achieve Desired Idle Speed (Too Low)
- International Fault Code SPN 188 FMI 14 — Engine Speed At Idle, Point 1: Special Instructions
- International Fault Code SPN 188 FMI 16 — Engine Speed At Idle, Point 1: Data Valid But Above Normal Operating Range – Moderately Severe Level
- International Fault Code SPN 188 FMI 18 — Engine Speed At Idle, Point 1: Data Valid But Below Normal Operating Range – Moderately Severe Level
Source: PACCAR MX-13 2017–2020 fault code list (Diesel Laptops). See also OBD-II codes.