× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0021 Diagnostic Trouble Code Discussion for May 2010

Camshaft Position 'A' Timing Over-Advanced / System Performance (Bank 2)

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0021
Help Request Posted
2006 Ford F-150 XLT 5.4L Poor Idle Quality, MIL Lamp on VIN: 1FTVX12556
P0021: Variable Cam Timing Over Advanced (Bank 2). I am looking for some information on the cam phasers. What does a bad one look like and can you check without a complete tear down? I believe the left one is bad as the spring looks sprung. Any info would be helpful.
May 05, 2010