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Code
P0638
Throttle

Papillon électronique — plage / performance

Le papillon n’a pas atteint la position demandée.

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Most likely causes

  1. Papillon encrassé
  2. Moteur de papillon

Symptoms you may notice

  • Check engine light
  • Limp mode
  • Poor throttle response

Checks to run

  1. Clean the throttle body
  2. Read the throttle angle live
  3. Test the actuator

Tools you may need

Throttle cleaner OBD-II scanner
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

Related codes in Throttle

P0120

Défaut circuit capteur de position papillon

 P0121

Capteur de position papillon — plage / performance

 P0220

Défaut capteur de position papillon B

 P2101

Moteur de papillon — plage / performance

 P2122

Capteur de pédale D — signal bas
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