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Posts Tagged: lean

P0174

Fix code P0174 System Too Lean (Bank 2) If you have a P0174 System Too Lean (Bank 2)  trouble code, read this to understand what it means Lean codes are incredibly difficult to diagnose. And it’s one trouble code where you don’t want to start throwing parts at the problem. The guys at the parts store will tell you to replace the Oxygen sensor. Nice guess, but probably wrong. They’re assuming that the fuel mixture is correct but the sensor is reporting it wrong. Oxygen sensors DO wear out. But what … Read More

Lean codes on ford windstar

Lean codes on ford windstar As if this vehicle didn’t have enough air leaks in it, some technicians have reported finding yet another location for an air leak. If you’ve fixed the lower intake manifold and are still getting Lean codes on ford windstar, check the IMRC where it enters the intake manifold. Apparently the “O” ring that seals the actuator shaft can leak. To test it out, apply some white lithium grease around the seal. If the lean condition stops, you’ve found the leak source. Technicians report that they … Read More


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