P0504 Code: Brake Switch A/B Correlation
CodePage.genericDisclaimer
Qu'est-ce que cela signifie ?
Code P0504 indicates a problem with the idle air control system or brake switch.
Diagnostic system: Idle speed and throttle control
On a Dodge Challenger, the P0504 code should be diagnosed as part of the idle speed and throttle control group. Related codes and live data from this same system can change the repair priority, so avoid replacing parts from the code name alone.
Most Common Causes for Dodge Challenger
- Corps de papillon sale ou défectueux
- Fuite de vide dans le système d'admission
- Contacteur de feux stop défectueux
- Faisceau de câblage endommagé ou cassé
Symptômes à surveiller
- Le voyant moteur est allumé
- Ralenti irrégulier ou instable
- Vitesse de ralenti anormalement élevée
- Vitesse de ralenti anormalement basse
- Le moteur cale de façon inattendue
- Vitesse de ralenti erratique ou fluctuante
CodePage.beforeReplacing
- Inspect intake leaks and throttle body carbon buildup.
- Check idle air or electronic throttle live data.
- Verify battery voltage and recent relearn procedures if the throttle body was cleaned or replaced.
- Check for blown fuses, weak battery voltage, and damaged connectors before buying major parts.
Comment Diagnostiquer
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Replacing throttle parts before cleaning, checking air leaks, and completing the correct idle relearn. Always confirm the fault with freeze-frame data, live data, visual inspection, and circuit checks before spending money on parts.
CodePage.faq
Can I drive with the P0504 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0504 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0504 code, your Dodge will automatically fail an OBD2 plug-in emissions or smog test.
What should I check first for P0504?
Inspect intake leaks and throttle body carbon buildup. Check idle air or electronic throttle live data. Verify battery voltage and recent relearn procedures if the throttle body was cleaned or replaced.
Join the Discussion
Estimation de réparation
Fuse, connector, wiring, cleaning, or basic inspection
Major component replacement after live data and circuit tests confirm failure
Comprend les pièces et la main-d'œuvre. Peut varier selon l'emplacement.
Cleaning and relearn are cheap; actuator or throttle body replacement should be data-confirmed.
Difficulté de réparation (DIY)
Can usually be performed at home with basic hand tools.