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Home/DTC Codes/Aston Martin/DB9/2004-2016 6.0L V12/P0120
P0120

Throttle/Pedal Position Sensor/Switch A Circuit

2004-2016 Aston Martin DB9 6.0L V12

High SeverityPowertrainGeneric (SAE)

Description

General malfunction in the throttle position sensor (TPS) or accelerator pedal position sensor circuit.

Symptoms

  • Check Engine Light
  • Erratic idle
  • Poor throttle response
  • Limp mode
  • Stalling

Common Causes

  • Faulty TPS
  • Wiring damage
  • Throttle body issue
  • PCM failure

Diagnostic Steps

  1. Test TPS voltage sweep (smooth transition 0.5-4.5V)
  2. Inspect wiring
  3. Check throttle body
  4. Test reference voltage

Repair Notes

Replace TPS or throttle body assembly. Some vehicles require TPS relearn procedure.

Related Codes

P0121Throttle/Pedal Position Sensor/Switch A Circuit Range/PerformanceP0122Throttle/Pedal Position Sensor/Switch A Circuit Low InputP0123Throttle/Pedal Position Sensor/Switch A Circuit High InputP0124Throttle/Pedal Position Sensor/Switch A Circuit IntermittentP0220Throttle/Pedal Position Sensor/Switch B Circuit

Other Powertrain Codes

P0120 on Other Vehicles

Aston Martin DB11

2016-2024 4.0L V8 Twin Turbo

Aston Martin DB11

2016-2024 5.2L V12 Twin Turbo

Aston Martin DB7

1994-2003 3.2L I6 Supercharged

Aston Martin DBS Superleggera

2019-2024 5.2L V12 Twin Turbo

Aston Martin DBX

2020-2024 4.0L V8 Twin Turbo

Aston Martin Vantage

2005-2024 4.7L V8

Aston Martin Vantage

2018-2024 4.0L V8 Twin Turbo

Common Questions

What does code P0120 mean on a 2004-2016 Aston Martin DB9?

P0120 stands for "Throttle/Pedal Position Sensor/Switch A Circuit". General malfunction in the throttle position sensor (TPS) or accelerator pedal position sensor circuit.

What are the symptoms of P0120 on a Aston Martin DB9?

Common symptoms of P0120 include: Check Engine Light, Erratic idle, Poor throttle response, Limp mode, Stalling.

What causes P0120 on a 2004-2016 Aston Martin DB9?

Common causes of P0120 include: Faulty TPS, Wiring damage, Throttle body issue, PCM failure.

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