P CODES (POWERTRAIN) P1400 - P1499 P1491

My Engine Code Comes Up P1491, But Is Not Overheating. I Did Notice Some Smoke From Under The Hood. I Have Not Driven It Since The...

Hi, I've Got A 2001 Jeep Grand Cherokee With 80000 Miles On It. Recently It Shows Me Check Engine Code P1491 Which Is Radiator Relay Fan....

Other Category Problem 1997 Dodge Neon 4 Cyl Automatic 122896 Miles Ok, I Took It To Inspection It Failed Because Of Emission Smoke...

What Is The Meaning Of This Code P1491 I Just Change The 2sensor And The Engine Check Still On

For The Last 5 Years I Have Been Experiencing Issues With The P1491 Code. The Rad Fan Relay Melts (see Photos) And After Replacing The Relay...