trouble codes
Le Mans Master
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Re: trouble codes (1990CORVETTE)
12 - std startup codes tells you system is ready and will flash 3 times - then error codes will follow each flashing 3 times, and ending with 12 flashing 3 times
so you have
12 x 3 - system ready
13 = Oxygen Sensor Unit (Diag: Check wiring and connection - Bad Sensor)
32 = Exhaust gas Recirculation Circuit (Diag: most common cause of this code is a bad or intermittent EGR switch which is located on the EGR pipe between the exhaust manifold and the intake maniforl. Replace this switch first when you get this code. Next check electrical connections at the EGR valve solenoid and then the ECM - Check all vacuum lines for leaks esp. around the EGR valve. Possible ECM failure.
so you have
12 x 3 - system ready
13 = Oxygen Sensor Unit (Diag: Check wiring and connection - Bad Sensor)
32 = Exhaust gas Recirculation Circuit (Diag: most common cause of this code is a bad or intermittent EGR switch which is located on the EGR pipe between the exhaust manifold and the intake maniforl. Replace this switch first when you get this code. Next check electrical connections at the EGR valve solenoid and then the ECM - Check all vacuum lines for leaks esp. around the EGR valve. Possible ECM failure.
