Attention Daniel M. I hope you can help me! My check engine light came on. I took it to the dealer and they replaced the EGR SOLIENOID. Two days later
it came on again. I checked it myself and got a 0302 code. That is the EGR SYS Hi/Low flow. Is that the same thing as the EGR Solienoid, or is that a different problem? I don't want to go back to the dealer if it is something different. They charge too much to fix things. That alone cost 234.00!

 

I do not know what the "EGR solenoid" is. There are several parts with names similar to that. Please contact your dealer and ask for clarification. At the same time ask them which Diagnostic Trouble Code prompted them to replace that part. If they charged $234 to resolve a DTC 0302, and the same DTC returned only two days later, they may have installed a defective part or made a wrong diagnosis.

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