Help with engine knock!
Thread Starter
Senior Member
Joined: Aug 2012
Posts: 760
Likes: 28
From: New Jersey
Pulled two codes today from the truck, 32 and 41. 32 can mean many things apparently such as
32
(R)
EVP – EGR not responding properly during test – EVP
(O,R,M)
EVR – EVP signal is/was low – EVR
(R,M)
PFE – PFE shows low pressure, EGR not seating or memory, not seating intermittently – PFE
I cleaned out my EGR valve but maybe it's still clogged?
Also the 41 code is
41
(R)
System lean – Fuel control
Which I'm guessing the truck running lean could be clogged fuel filter or due to the vacuum leaks the truck has? Any help diagnosing the codes would be greatly appreciated! Thanks!
32
(R)
EVP – EGR not responding properly during test – EVP
(O,R,M)
EVR – EVP signal is/was low – EVR
(R,M)
PFE – PFE shows low pressure, EGR not seating or memory, not seating intermittently – PFE
I cleaned out my EGR valve but maybe it's still clogged?
Also the 41 code is
41
(R)
System lean – Fuel control
Which I'm guessing the truck running lean could be clogged fuel filter or due to the vacuum leaks the truck has? Any help diagnosing the codes would be greatly appreciated! Thanks!
Senior Member
Joined: Aug 2010
Posts: 2,669
Likes: 116
From: Long Beach, CA
All of these lead back to the EGR or EVAP system malfunctioning. Test the system for vacuum leaks, electrical connections and sensors, solenoid function and vacuum actuator function. You will need a vacuum gauge, pump and a voltmeter. If it's stuck it can cause a lean condition and cause knock and ping from detonation. If that's the issue fix it before you continue driving. Detonation can destroy the engine.