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P0120 Diagnostic Trouble Code Discussion for January 2019

Throttle Position Sensor Circuit Malfunction


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Trouble Ticket Help Requests for DTC P0120
Help Request Posted
2003 Toyota Highlander 3.0L No Start VIN: JTEHF21A73
P0120: Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction. Towed in as no start. Observed new battery, tried to start. No starting, NO check engine lamp during ignition on. No communication with ECU. All other modules responding. Verified 5.0v output to TPS, nothing. Verified power at E5 pin 1 & 2, verified gr...
January 10, 2019