What P0506 means
Idle Control System RPM - Lower Than Expected
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P0506:
| AUDI | Defective or sticking Idle Air Control Motor, Intake Manifold Vacuum leaks, Carbon buildup in the Throttle Body air passages, Defective Power Steering Pressure Switch |
| BMW | Idle Air Control System RPM Lower Than Expected |
| FORD | Idle Air Control System RPM Lower Than Expected |
| HONDA | Idle Control System RPM Lower Than Expected |
| MITSUBISHI | Idle Control System RPM lower Than Expected; ISC RPM lower than expected |
| NISSAN | Idle Control System RPM lower Than Expected |
| VOLKSWAGEN | Idle Speed Low |
Read this code on your own car
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