Cummins Turbo Fault Codes

Cummins fault code 646 commonly relates to turbocharger control, boost pressure, or air-handling performance.

Cummins fault code 691 commonly points to turbocharger actuator, boost control, or air-handling system performance.

Cummins fault code 2448 is commonly associated with turbocharger speed, turbocharger control, or air-handling performance.

Cummins fault code 2636 generally indicates turbocharger actuator performance or boost control mismatch.