Rick's Free Auto Repair Advice

Posts Tagged: PCV valve

P0106 P0171 Aveo

Fix code P0106 P0171 Chevrolet Aveo with 1.6L engine GM has issued a technical service bulletin to address P0106 P0171 and a whistling problem in the 2009-11 Chevrolet Aveo with the 1.6L engine. In addition to the whistling noise, you’ll find the Check Engine light on and either of these trouble codes in memory: P0106 P0171. The problem is most likely caused by a ruptured diaphragm in the PCV valve. To make sure, start the engine and wait until it makes the whistling sound. Then remove the oil dipstick or … 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

PCV Valve Rip Off

Is a PCV Valve a Rip Off Shops ALWAYS recommend replacing your PCV valve. But that’s just their normal PCV valve rip off routine. Before I explain how the rip off works, you need to know a bit about engines. Think of the piston and cylinder like a doctor’s syringe. The rubber tip on the plunger is the piston. If you look closely at the rubber tip, you’ll see several rings around it. Those rings press against the side of the syringe and seal it so it can push the … Read More


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