obd code P021AB

Reply Subscribe

Thread Tools

Search this Thread

Oct 13, 2023 | 09:59 AM

Ctlcwnd

Thread Starter

1st Gear

Joined: Oct 2023

Posts: 1

Likes: 0

obd code P021AB

Looking for in depth information on this code { PO21AB} and poss diagnosis flow chart. this is a 33,000 mile 2015 6.7 superduty 250 ford.pickup. with a check lite that comes on . i know ford has extend warranty on this truck for a DEF sensor and heater does this code (Po21ab) relate to poss warranty coverage? personly i refuse to pay a ford dealer diagnosis when it cost nearly $185 an hour to tell me somthing is or may not be covered.. Looking for a little help thanks...

Oct 14, 2023 | 10:00 AM

projectSHO89

Hotshot

Joined: Jan 2004

Posts: 19,763

Likes: 1,082

From: St Louis

Recheck that fault code, you have an extra character in there somewhere. The expected format is Pxxxx where xxxx is an alphanumeric string, perhaps followed by a two character sub-code.