Rick's Free Auto Repair Advice

Posts Tagged: idle air control

P1506 Ford high idle speed

Fix code P1506 Ford high idle speed If you own a Ford Escort, Focus, or Tracer with the 2.0-liter engine and experience a high idle speed or trouble code P1506. The official definition is P1506 Idle Air Control System Over speed Error. That means the idle air controller has tried to maintain the proper idle speed, yet the idle speed is still too high. Start by disconnecting the connector to the idle air controller (IAC) solenoid. The idle speed should drop very low. Or the engine may stall. However, if … Read More

Fix code P1506 on Ford

Fix code P1506 – Idle Air Control System Over speed Error If you get this P1506 – Idle Air Control System Over speed Error code on a Ford vehicle with the Duratec engine, don’t start with an idle air controller valve (IAC) replacement. This vehicle has a LOT of vacuum leaks and that can cause serious idle problems. Air leaks into the engine AFTER the MAF has already metered the incoming air. So the oxygen sensor sees a very lean exhaust. Since the vehicle is at idle, the computer tries … Read More


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