You are offline — AutoTools still works from your device.
AutoTools
Tools AI assistant OBD Codes Encyclopedia Guides Expert tips Blog Quiz FAQ
Code
P0506
Idle

Idle speed lower than expected

The engine idles below the expected speed.

Search another code
Advertisement

Most likely causes

  1. Dirty throttle body
  2. Vacuum leak
  3. Faulty idle control
  4. Restricted air intake

Symptoms you may notice

  • Low / rough idle
  • Stalling
  • Check engine light

Checks to run

  1. Clean the throttle body
  2. Smoke-test the intake
  3. Test idle control

Tools you may need

Throttle cleaner Smoke machine
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

Related codes in Idle

P0507

Idle speed higher than expected

 P0508

Idle air control circuit low input

 P0509

Idle air control circuit high input
Advertisement
Install AutoToolsWorks offline, one tap away.
Ask the AI mechanic
Hi! Ask me anything about your car — codes, noises, parts, maintenance.
All tools