PACCAR (Kenworth & Peterbilt)
PACCAR fault code
SPN 626
PACCAR Fault Code P1694: Cold Starting Aid – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (C72) or Pin (C49)
P1694 on PACCAR (Kenworth & Peterbilt) engines means: Cold Starting Aid – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (C72) or Pin (C49).
Code details
- Manufacturer
- PACCAR (Kenworth & Peterbilt)
- Applies to
- PACCAR MX-13 (2017–2020)
- Fault code
- P1694
- J1939 SPN
- 626
- 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.
- 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 P1693 — Cold Starting Aid – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (C72) or Pin (C49)
- Cummins Fault Code 381 — Intake Air Heater (Relay Enable) #1 Circuit - data incorrect
- Cummins Fault Code 382 — Intake Air Heater (Relay Enable) #2 Circuit - data incorrect
- Cummins Fault Code 384 — Start Assist Device Control Circuit Error (Ether Injection)
- Cummins Fault Code 487 — Start Assist Device - Canister Empty (Ether Injection)
- International SA 33 SPN 626 FMI 5 — Fuel Heater Relay Under Current Or Open Circuit
- International SA 33 SPN 626 FMI 6 — Fuel Heater Relay Over Current
- International Fault Code SPN 626 FMI 3 — Engine Start Enable Device 1: Voltage Above Normal, Or Shorted To High Source
Source: PACCAR MX-13 2017–2020 fault code list (Diesel Laptops). See also OBD-II codes.