P0506
Medium SeverityIdle Air Control System RPM Lower Than Expected
Engine System
What Does P0506 Mean?
Idle speed is too low. The IAC is trying to raise it but cannot.
Common Fix
Clean throttle body/IAC
Estimated Cost (DIY)
$5 - $80
Common Causes
How to Diagnose P0506
- 1Clean throttle body and IAC
- 2Check for vacuum leaks
- 3Replace IAC valve if cleaning fails
OEM Diagnostic Flowchart
Scroll to load technician if/then branches.
Read live data and freeze frame for P0506 to pinpoint the cause before buying parts.
Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0506.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali AWD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-6.0L Service Manual | Operation CHARM Operation CHARM : Car repair...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...
Related Symptoms
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Browse →Open the exact vehicle hub grounded by OEM manual evidence related to P0506.
Open the exact vehicle hub grounded by OEM manual evidence related to P0506.
Open the exact vehicle hub grounded by OEM manual evidence related to P0506.
Open the exact vehicle hub grounded by OEM manual evidence related to P0506.
Related Codes
Frequently Asked Questions
- Why does my car stall at red lights?
- Low idle speed from a dirty IAC or throttle body cannot keep the engine running when you take your foot off the gas.
- Can a dirty throttle body cause P0506?
- Absolutely — carbon buildup restricts airflow at idle. Cleaning it is the first thing to try.