I have a PO401 code. I have checked egr valve with vacurm tester and it is holding vacurm.
May 28, 2012 at 11:49 AM
How can I tell if my egr vacurm modulator is working or not.I Thank You
GEORGE R
- MEMBER
- 1 POST
Advertisement
i would remove the valve and make sure you have vacuum and exhaust present at the valve.
you need to verify the solenoid is working correctly and if it is getting the correct signal from the pcm.
the modulator need to be checked as well but i would look at this last to make sure the rest of the system is working correctly.
Roy
you need to verify the solenoid is working correctly and if it is getting the correct signal from the pcm.
the modulator need to be checked as well but i would look at this last to make sure the rest of the system is working correctly.
Roy
May 28, 2012 at 11:53 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement
parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.