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ti carina toyota 1999When i switch on head lights engine rpm goes down and engine rpm starts to fluxuate

Vehicle: 1999

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Hi there,

This code indicates an issue with the throttle pedal position sensor. Here is some info for you.

P0120 TOYOTA - Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction

Read more: https://www.autocodes.com/p0120_toyota.html

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