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Home/DTC Codes/Lincoln/MKX/2018-2018 3.7L V6/P2128
P2128

Throttle/Pedal Position Sensor/Switch E Circuit High

2018-2018 Lincoln MKX 3.7L V6

Critical SeverityPowertrainGeneric (SAE)

The 2018 Lincoln MKX is equipped with a 3.7L V6 engine. Below you'll find detailed p2128 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

High voltage from accelerator pedal position sensor E.

Symptoms

  • Limp mode
  • Check engine light
  • Possible unintended throttle input

Common Causes

  • Open ground
  • Short to voltage in harness
  • Failed sensor

Diagnostic Steps

  1. Measure sensor E voltage
  2. Check ground circuit
  3. Inspect wiring

Repair Notes

Replace accelerator pedal assembly or repair wiring.

Related Codes

P2127Throttle/Pedal Position Sensor/Switch E Circuit Low

Other Powertrain Codes

P2128 on Other Vehicles

Lincoln Aviator

2003-2003 4.6L V8 DOHC

Lincoln Aviator

2004-2004 4.6L V8 DOHC

Lincoln Aviator

2005-2005 4.6L V8 DOHC

Lincoln Aviator

2020-2020 3.0L Twin-Turbo V6

Lincoln Aviator

2020-2020 3.0L V6 Twin Turbo

Lincoln Aviator

2020-2020 3.0L V6 Twin Turbo Hybrid

Lincoln Aviator

2021-2021 3.0L Twin-Turbo V6

Lincoln Aviator

2021-2021 3.0L V6 Twin Turbo

Common Questions

What does code P2128 mean on a 2018-2018 Lincoln MKX?

P2128 stands for "Throttle/Pedal Position Sensor/Switch E Circuit High". High voltage from accelerator pedal position sensor E.

What are the symptoms of P2128 on a Lincoln MKX?

Common symptoms of P2128 include: Limp mode, Check engine light, Possible unintended throttle input.

What causes P2128 on a 2018-2018 Lincoln MKX?

Common causes of P2128 include: Open ground, Short to voltage in harness, Failed sensor.

Last updated: March 2026

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