C1124: Input shaft speed signal missing/faulted

MediumChassisChassis Electronics

What does C1124 mean?

C1124 is a diagnostic trouble code indicating "Input shaft speed signal missing/faulted". This code relates to your vehicle's chassis electronics and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.

Common causes

  • Faulty chassis electronics component
  • Wiring or connector issue in the related circuit
  • Failed sensor providing incorrect readings
  • Software/calibration issue requiring ECU update
  • Related component causing secondary fault

What should you do?

Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.

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Code C1124 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.

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Related codes

C1123Vehicle Speed Sensor Input Short to Battery
C1126Cruise Control Command Switch Assembly Circuit Failure
C1117RPM Input Circuit Failure
C1116Starter Motor Circuit Failure