P1390 Fault Code
You can find information about the P1390 fault code on this page.
BE WARNED! This particular code can mean a different thing depending on what make the car is, check below.
Manufacturer-Specific Meanings
Jeep P1390
"Timing Belt Skipped One Tooth or More"
Dodge P1390
"Timing Belt Skipped One Tooth or More"
Chrysler P1390
"Octane Adjust Shorting Bar Out or Circuit Open"
Ford P1390
"Octane Adjust out of Self-Test Range"
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