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P01AC

Alternative Fuel Tank Temperature Sensor Circuit Low

Generic OBD-II

Common symptoms

What you'll notice

Common causes

Most likely first

  1. Faulty or malfunctioning alternative fuel tank temperature sensor
  2. Wiring or connection issue in the alternative fuel tank temperature sensor circuit
  3. Low fuel level in the alternative fuel tank
  4. Incorrect fuel blend or fuel quality in the alternative fuel tank
  5. Faulty or malfunctioning engine control module (ECM) or powertrain control module (PCM)

How to diagnose & fix

Work through it in order

  1. Engine misfires or rough running
  2. Decreased fuel efficiency
  3. Difficulty starting the vehicle
  4. Check Engine Light illuminates
  5. Impaired acceleration or power loss

Read & clear P01AC yourself

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