OBD Guide
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P0505

Idle Control System

P0505 is an OBD-II diagnostic trouble code meaning: Idle Control System. Common causes: idle speed sensor malfunction, throttle valve contamination. Estimated repair cost: $22–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–111 (est.)

Symptoms

  • Unstable idle
  • Engine stalls at idle
  • Floating speed

Causes

  • Idle speed sensor malfunction
  • Throttle valve contamination
  • Wiring Harness Problems
  • ECU malfunction

How to Fix

  1. Check and clean the throttle valve
  2. Check idle speed sensor
  3. Check wiring harness for damage
  4. Check the operation of the computer

Related codes

P0506P0507

Error P0505 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0505 code mean?

P0505 is an OBD-II diagnostic trouble code that indicates: Idle Control System

What causes a P0505 error code?

The most common causes of P0505 include: Idle speed sensor malfunction; Throttle valve contamination; Wiring Harness Problems; ECU malfunction.

How do I fix a P0505 diagnostic trouble code?

To fix P0505: Check and clean the throttle valve. Check idle speed sensor. Check wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0505?

Limited driving only, diagnose soon

How much does it cost to fix P0505?

The estimated repair cost for P0505 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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