P1509 BUICK - Idle Speed High Idle Air Control System Not Responding
P1509 BUICK Possible Causes
- Faulty Idle Air Control (IAC)
- Idle Air Control Valve harness is open or shorted
- Idle Air Control Valve circuit poor electrical connection
First diagnose P1509 BUICK code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the P1509 BUICK code
Labor: 1.0The cost of diagnosing the P1509 BUICK code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
P1509 BUICK Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine rough idle
P1509 BUICK MeaningWith the engine runtime 2 minutes, closed throttle, Engine Coolant Temperature (ECT) input over 122°F, Intake Air Temperature (IAT) over 62°F, VSS under 3 mph, the Powertrain Control Module (PCM) detects that the Actual idle speed was 175 rpm higher than desired idle speed.
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