egr circuit
Melting Slicks
Joined: Feb 2011
Posts: 2,322
Likes: 6
From: Los Altos CA
This is a fairly common code indicating the EGR temp switch isn't doing what the ECM expects either due to an EGR problem, temp switch problem or wiring issue.
Do a search for code 32 & you'll find lots of threads on the subject including mine where I discuss how to adjust your temperature switch, and a more recent one indicating they are for sale again (rendering my thread obsolete).
Your FSM has a diagnostic chart to guide you.
Do a search for code 32 & you'll find lots of threads on the subject including mine where I discuss how to adjust your temperature switch, and a more recent one indicating they are for sale again (rendering my thread obsolete).
Your FSM has a diagnostic chart to guide you.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Team Owner
Joined: Jan 2003
Posts: 20,292
Likes: 239
From: Summerland B.C. Canada
Melting Slicks
Joined: Feb 2011
Posts: 2,322
Likes: 6
From: Los Altos CA
I've seen that posted here before but didn't remember where.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Two things can cause a code 32.
When the car is first turned on, the ECM tests the connection to the temperature switch on the EGR tube. The temperature switch only closes at high temperatures, so if it's closed at startup there's something wrong with the switch or wiring. If the ECM sees a ground there it sets code 32.
When the ECM commands the EGR to open, several things happen. The ECM turns on the EGR solenoid (mounted on the thermostat housing). The EGR solenoid sends vacuum to the EGR valve. When the EGR valve opens, hot exhaust gas is fed into the intake manifold. This hot exhaust gas flows through the EGR tube, which is sensed by the temperature switch, which closes. The ECM turns on the EGR solenoid and then checks to make sure the temperature switch has closed. If it doesn't close, it sets code 32. This can be caused by bad wiring, bad EGR solenoid, bad vacuum connections, bad temperature switch or a bad EGR valve. The usual symptom is that the SES light will come on while cruising at highway speed. The SES light will not be on when the engine is restarted.
When the car is first turned on, the ECM tests the connection to the temperature switch on the EGR tube. The temperature switch only closes at high temperatures, so if it's closed at startup there's something wrong with the switch or wiring. If the ECM sees a ground there it sets code 32.
When the ECM commands the EGR to open, several things happen. The ECM turns on the EGR solenoid (mounted on the thermostat housing). The EGR solenoid sends vacuum to the EGR valve. When the EGR valve opens, hot exhaust gas is fed into the intake manifold. This hot exhaust gas flows through the EGR tube, which is sensed by the temperature switch, which closes. The ECM turns on the EGR solenoid and then checks to make sure the temperature switch has closed. If it doesn't close, it sets code 32. This can be caused by bad wiring, bad EGR solenoid, bad vacuum connections, bad temperature switch or a bad EGR valve. The usual symptom is that the SES light will come on while cruising at highway speed. The SES light will not be on when the engine is restarted.
Burning Brakes
Joined: Aug 2004
Posts: 1,174
Likes: 125
From: Dunstable MA
St. Jude Donor '05
I was getting a code 32 when starting the car and found out I'd screwed the temp switch in too tight (so it was closed all the time). Cliff's post clears up for me what was going on.
