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2018 MAZDA MX-5 MIATA

2.0L I4RWDMANUALgas
Repairs0Labor520Torque6066Fluid7DTC917Battery0Maintenance0Recalls0
P2135critical severityPowertrain

Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation

on 2018 Mazda MX-5 Miata 2.0L I4 · RWD

What this code means

The dual throttle position sensors are reporting conflicting values, indicating a fault.

Symptoms

  • Limp mode
  • Reduced power
  • Check engine light
  • Erratic throttle response

Common causes

  • Failed TPS (built into throttle body)
  • Connector corrosion
  • Intermittent wiring
  • 5V reference circuit fault

Diagnostic steps

  1. Check TPS sensor A and B voltages
  2. Verify 5V reference
  3. Wiggle test wiring
  4. Check connector pins

Repair notes

Replace throttle body assembly (TPS is integrated). Check 5V reference shared with other sensors.

Other Powertrain codes on this vehicle

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