What causes a SPN 7357 code?

SPN 7357 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a SPN 7357 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 7357 active.

How do I fix SPN 7357?

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

J1939 SPN

SPN 7357

Cummins fault code 7357

What it means

Aftertreatment Intake Air Heater Circuit - Voltage Below Normal or Shorted to Low Source. This relates to the heater used during the regeneration process to maintain exhaust temperature.