The check engine light came on on my wife's 2001 Lumina. It has the 3.1 V6 engine.
On the advice of a friend she took it to Auto Zone for a free diagnostic check. The error code retrieved from the check is: DTC P0405 Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage.
Will changing the EGR valve fix this? What other causes could there be?
Serious answers please. We live on a fixed income. That means we have to live on what we have left after we: Fix the car, Fix the Washing Machine, Fix the Lawn Mower, etc.|||The EGR valve is expensive and probably only needs to have the carbon cleaned from the valve seat. I just did a 99 Grand Prix with a similar error code by simply removing the valve and cleaning it, then re-installing with a new gasket. You can easily check and clean any carbon blockage in the EGR passage ways leading to the intake manifold at the same time. It's not a critical condition and you can take your time getting it fixed. However if you ever encounter a yellow check engine light that flashes every second or so, you need to get it fixed ASAP.
http://www.samarins.com/diagnose/checken鈥?/a>
http://www.troublecodes.net/articles/myt鈥?/a>
http://www.mobil1.com/USA-English/MotorO鈥?/a>|||usally replacing it will be the end result, circuit voltage low means faulty internally or if your lucky bad connection. Try just pull off the elect connector and clean it, try to use something with non residue when dry. recommend when refitting the connector put it on / off a few times so that the terminals scratch up a bit causing a better connection. see how you go.|||Yes changing the EGR valve will fix it; I had the same problem with my 2000 impala with a 3.8 engine. If you don't have the money to fix it now you can wait till you do; but your fuel economy will suck.
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