OBD Guide
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P0123

Throttle/Pedal Position Sensor/Switch A Circuit High

P0123 is an OBD-II diagnostic trouble code meaning: Throttle/Pedal Position Sensor/Switch A Circuit High. Common causes: throttle position sensor malfunction, open or shorted wiring harness. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • Unstable idle
  • Jerks when accelerating
  • Increased fuel consumption
  • Check Engine Light Illuminates
  • Switching to emergency mode

Causes

  • Throttle Position Sensor Malfunction
  • Open or shorted wiring harness
  • Poor contact in connectors
  • Contact corrosion
  • Problems with power or grounding of the circuit
  • Engine ECU malfunction

How to Fix

  1. Check the sensor readings using a diagnostic scanner
  2. Visually inspect the sensor and wiring harness for damage.
  3. Check resistance and voltage at sensor according to manufacturer's specifications
  4. Check the continuity of the circuit and the condition of the connectors
  5. If necessary, replace the sensor or repair the wiring harness
  6. Clean throttle valve adaptations after repair

Related codes

P0122P0124P0222P0223

Error P0123 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0123 code mean?

P0123 is an OBD-II diagnostic trouble code that indicates: Throttle/Pedal Position Sensor/Switch A Circuit High

What causes a P0123 error code?

The most common causes of P0123 include: Throttle Position Sensor Malfunction; Open or shorted wiring harness; Poor contact in connectors; Contact corrosion.

How do I fix a P0123 diagnostic trouble code?

To fix P0123: Check the sensor readings using a diagnostic scanner. Visually inspect the sensor and wiring harness for damage.. Check resistance and voltage at sensor according to manufacturer's specifications. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0123?

Limited driving only, diagnose soon

How much does it cost to fix P0123?

The estimated repair cost for P0123 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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