C1250
What This Code Means
Rough running; Power imbalance between banks; Injector fault codes; Reduced boost; Excessive smoke; Turbo bearing noise; Coolant temperature exceedances; System pressure loss in either loop; Filter clogging; Hard starting; Injector fouling; Slow crank; Failed start; Reduced boost efficiency; Intake temperature rise; Misfiring; Rough idle; Check engine lamp; Elevated emissions; Rich or lean condition; Unstable idle; Poor transient response; Intermittent misfiring; No-start condition; Fault code; Elevated exhaust backpressure; Loss of power; Emissions exceedance; Excessive exhaust smoke; High exhaust temperature; Failed start requirement; Power imbalance; System pressure loss; Communication faults; Sensor input errors; Reduced power output
Possible Causes
- •MCRS fuel injection system fault
- •Turbocharger malfunction
- •2P2L cooling system failure
- •Fuel quality degradation
- •Tank degradation
- •Stagnant fuel
- •Starting system (24V battery bank) degradation
- •Infrequent equipment exercise
- •Charge air cooler leaks
- •Infrequent exercise of units
- •Spark plugs (multi-cylinder) failure
- •Gas regulator / air-fuel mixer failure
- •Ignition system (coils / module) failure
- •Catalytic converter failure
- •Turbocharger failure
- •MCRS fuel injection system failure
- •Starting system (24V battery bank) failure
- •Infrequently exercised units
- •Fuel injection system (MCRS) injector fault
- •Cooling system failure
Suggested Actions
- 1Perform firmware update
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