U0138
Système
Network (CAN Bus)
Scanner requis
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Suspension Control Module

Understand U0138, common causes, and the right FOXWELL scanner to diagnose it.

Adaptive or air suspension control module offline.

Symptômes courants

  • Suspension fault light
  • Vehicle sits low or high
  • Ride harshness

Causes typiques

  • Failed suspension module
  • CAN wiring to compressor
  • Air leak causing module shutdown
  • Low voltage

Quel scanner choisir ?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Utilisez les données en direct et le freeze frame avant de remplacer des pièces. Les codes ABS, SRS et U nécessitent souvent un scanner mult systèmes.

Conseils de diagnostic

  • Enregistrez le freeze frame lors de la première apparition du code
  • Effacez le code uniquement après avoir corrigé la cause
  • Vérifiez les codes en attente associés
  • Vérifiez que la batterie est au-dessus de 12,4 V avant de suspecter un capteur

Scanners FOXWELL recommandés

Questions fréquentes

Can I diagnose U0138 with a basic code reader?
U0138 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with U0138?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.