Code 32 - EGR System Failure
Code 32 means that the EGR diagnostic switch was closed during start-up or that the switch was not detected closed under the following conditions: Coolant temperature greater than 176°F (80°C), EGR duty cycle commanded by the ECM is greater than 55 percent and TPS at less than half throttle, but not idle. All conditions must be met for about 5 minutes.
NOTE:
The following step numbers refer to the numbers on the Diagnostic Flow Charts.
- If the first step caused Code 32 to set, then the ECM has recognized a closed vacuum switch on start-up. This test determines whether the EGR control valve, the wiring or the ECM is the cause.
- With the ignition on, the solenoid should not be energized and vacuum should not pass to the EGR valve.
- To this point, the EGR solenoid and valve are okay and the following step will check the diagnostic vacuum portion of the system.
- The diagnostic switch should close at about 2" of vacuum. With vacuum applied, the switch should close and resistance go to near zero ohms. The switch should also hold vacuum or it is defective.
NOTE:
Before using this chart, check for ported vacuum to EGR solenoid, also check hoses for leaks or restrictions, should be at least 23.64 kPa (7" Hg) vacuum at 2000 RPM.