Hi
Can anyone comment on remedy for the 0302 error code that came up on my 98 GXE.
thanks

 

Upper/Lower EGR

 

Diagnostic Trouble Code 0302 points to a problem with the Exhaust Gas Recirculation system. The malfunction is detected by the Engine Control Module when no EGR flow is detected under conditions which call for EGR. Possible causes include:
- The electrical harness or connectors (valve circuit open or shorted)
- The EGR valve is stuck closed
- Weak or dead battery
- The EGR passage is clogged
- Faulty EGR temperature sensor and circuit
- A leak somewhere in the exhaust system

The EGR Volume Control Valve may be tested with an ohmmeter. Disconnect the electrical connector. Looking at the connector half which is attached to the EGRVCV with the latch at the 12 o'clock position you will see two rows of three terminals. The top row is numbered 1-3, right to left. The bottom row is numbered 4-6, right to left. Measure the resistance between these terminal pairs:
2 and 1
2 and 3
5 and 4
5 and 6
... all resistance values should be 20.9-23.1 ohms at 68 degrees F.

Reconnect the EGRVCV connector halves. Turn the ignition switch ON and OFF repeatedly. Verify that the EGRVCV shaft moves smoothly forward and backward according to the ignition switch position.

The Exhaust Gas Temperature Sensor may be tested with an ohmmeter. The specifications are ...
- at 32 degrees F, 0.68-1.11 Megohms
- at 122 degrees F, 0.09-0.12 Megohms
- at 212 degrees F, 0.017-0.024 Megohms

 

Would a test pipe replacing the stock cat throw this code or would a blown gasket possible do it? Maybe not !

I got this 0302 code this morning and I was taking the car into the dealership to have some things checked out anyway. I will report back their findings.

 

I got this 0302 code this morning and I was taking the car into the dealership to have some things checked out anyway. I will report back their findings.[/QUOTE]

Have you got fixed? What's the finding? I have the same problem and would like to know the solving methods. Thks.