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Home >> Toyota >> 1991 >> Pickup Base, W55 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4-CYL >> Code Charts >> Code 51 - Switch Signal >> Probable Causes:

Probable Causes:

Accelerator Pedal or Cable
ECU
Neutral/Start Switch or Switch Circuit
Throttle Position Sensor or Sensor Circuit

NOTE: Diagnostic chart not available from manufacturer.

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