Code 32 mystery
Thread Starter
Drifting
Joined: May 2020
Posts: 1,661
Likes: 701
From: Baton Rouge, Louisiana, metro area
Code 32 mystery
1991 Coupe, stock L98.
Recently pulled intake. New gaskets, vacuum lines, all new EGR components.
Car has been running great with no codes for several months.
Recently began getting a Code 32 SES but only when I go over 65 or so mph.
I can drive for 30 miles under 64-66 mph and no code.
If I hit the Interstate, it gives a Code 32 within a few minutes.
Any suggestions or ideas?
Recently pulled intake. New gaskets, vacuum lines, all new EGR components.
Car has been running great with no codes for several months.
Recently began getting a Code 32 SES but only when I go over 65 or so mph.
I can drive for 30 miles under 64-66 mph and no code.
If I hit the Interstate, it gives a Code 32 within a few minutes.
Any suggestions or ideas?
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
Code 32
Code 32 is EGR.
check your vacuum lines to solenoid and make sure temp sensor wire did not fall off.
that wire gets brittle over time and breaks.
on my 86, the wire just broke.
the sensor resistance changes when hot exhaust is flowing in the tube which is the signal the computer reads that verifies the egr is called for, the vacuum lines are intact, and the valve is working
check your vacuum lines to solenoid and make sure temp sensor wire did not fall off.
that wire gets brittle over time and breaks.
on my 86, the wire just broke.
the sensor resistance changes when hot exhaust is flowing in the tube which is the signal the computer reads that verifies the egr is called for, the vacuum lines are intact, and the valve is working
Last edited by coupeguy2001; Aug 25, 2021 at 08:55 PM.
Thread Starter
Drifting
Joined: May 2020
Posts: 1,661
Likes: 701
From: Baton Rouge, Louisiana, metro area
Code 32 is EGR.
check tour vacuum lines to solenoid and make dure temp sensor wire did not fall off.
that wire gets brittle over time and breaks.
on my 86, the wire just broke.
the sensor resistance changes when hot exhaust is flowing in the tube which is the signal the computer reads that verifies the egr is called for, the vacuum lines see intact, and the valve is working
check tour vacuum lines to solenoid and make dure temp sensor wire did not fall off.
that wire gets brittle over time and breaks.
on my 86, the wire just broke.
the sensor resistance changes when hot exhaust is flowing in the tube which is the signal the computer reads that verifies the egr is called for, the vacuum lines see intact, and the valve is working
I recently replaced the plug on my EGR solenoid, however, I will double check my soldered wire connections.
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
Egr
The sensor on an 85 is on the valve.
maybe they went back to that configuration
when you say you soldered the wires, are they in an sreathat would melt the solder?
if so, crimp or silver solder is the fix
maybe they went back to that configuration
when you say you soldered the wires, are they in an sreathat would melt the solder?
if so, crimp or silver solder is the fix
Thread Starter
Drifting
Joined: May 2020
Posts: 1,661
Likes: 701
From: Baton Rouge, Louisiana, metro area
There is no EGR diagnostic temp sensor on the 90-91. The 90-91 DTC32 is a completely different strategy than the temp sensor used in 85-89. The diagnostic requires no closed-throttle for about 3-4 minutes, and this condition is generally only met at highway speed. If the throttle is completely closed, the timer starts over.
Restricted EGR passages in the manifold, pipes or plenum can cause Code 32.
Restricted EGR passages in the manifold, pipes or plenum can cause Code 32.
I should be able to blow compressed air from the inlet port on the intake through to the EGR valve port, correct?
