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PO420 Fault Code Cause
On my 09, 6.4 L I get the PO420 fault code. which is Catalyst System Efficiency Below Threshold (Bank 1). I know you have the 3 exhaust temp. sensors in the piping. has anyone already been down this road and knows which one of the three can cause this code. That is if it is not the...- kbeen
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- Replies: 0
- Forum: 6.4L PowerStroke Engine & Drivetrain
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K
Newbie New to Forum
Hello,, kbeen here. just joined the super duty forum. appreciate being able to gain some information from other peoples experiences and hopefully be able to help someone in return. I am a retired caterpillar tech of 30 years and now work for my family business. we have total of 6 super...- kbeen
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- Replies: 5
- Forum: New SuperDutyDiesel Member Introductions
