P0506 on Chevrolet
Idle Air Control System RPM Lower Than Expected
P0506 on Chevrolet vehicles indicates idle air control system rpm lower than expected. Au7o has documented this code across 1 Chevrolet model — most commonly on Equinox. This code means the engine computer detected that the engine's idle speed is lower than the target idle RPM it commanded. The PCM controls idle speed through the idle air control valve or electronic throttle and sets this code when the actual idle drops below expected. A low or rough idle can cause stalling, hesitation, and reduced drivability. Typical repair costs on Chevrolet range from $150 to $900, depending on the specific model and root cause.
Common Causes of P0506
- •Vacuum leak in intake or hoses
- •Dirty or carbon-clogged throttle body
- •Faulty idle air control (IAC) valve
- •Dirty or failing mass airflow sensor
- •Clogged PCV system or EGR sticking open
- •Worn or dirty fuel injectors
- •Excessive engine load from accessories
P0506 on Chevrolet by Model
Chevrolet Equinox(1 issue)
- Turbo Wastegate Regulator Solenoid Failure Causing Overboost/Underboost and Reduced Engine Power2016-2022
The turbocharger wastegate regulator solenoid (and the wastegate actuator linkage) on the turbo engines can stick, weaken, or freeze - moisture and oil condensate can jam the solenoid in cold weather. The result is erratic boost control that trips overboost or underboost faults and throws the vehicle into limp mode with a 'Engine Power Is Reduced' message, sometimes limited to ~15 mph. Testing shows wastegates weakening as early as ~8k miles on hard-used examples. This is a boost-control defect separate from the covered charge-air-cooler condensation issue.
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View P0506 across all makes →Frequently Asked Questions
What does P0506 mean on Chevrolet?▼
P0506 stands for "Idle Air Control System RPM Lower Than Expected." This code means the engine computer detected that the engine's idle speed is lower than the target idle RPM it commanded. The PCM controls idle speed through the idle air control valve or electronic throttle and sets this code when the actual idle drops below expected. A low or rough idle can cause stalling, hesitation, and reduced drivability. On Chevrolet specifically, this code is documented across 1 model.
What causes P0506 on Chevrolet vehicles?▼
Common causes on Chevrolet: Vacuum leak in intake or hoses, Dirty or carbon-clogged throttle body, Faulty idle air control (IAC) valve, Dirty or failing mass airflow sensor, Clogged PCV system or EGR sticking open. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0506 on a Chevrolet?▼
Repair costs on Chevrolet range from $150 to $900, depending on the specific model and root cause.
Which Chevrolet models have P0506 documented?▼
Au7o has documented P0506 on 1 Chevrolet model: Equinox.