Often a brand new element will be the finest repair

Q: I have a 2005 Chrysler Town and Nation Touring with 3.8 liter V-6. I just saw the check engine" light come on, as well as the scan-tool code is P0406. From what I've seen on the web, there is 98 % probability that it?ˉs the exhaust gas recirculation valve. Appears like I can replace it myself, but is there a way I can confirm the poor portion prior to investing $60-$100 for the component? My scan tool is actually a simple, not Chrysler-specific.
?a Jim Cauble
A: Jim, it's neat to find out folks communicating with their cars and trucks as you might have.
Diagnostic problems code P0406 indicates the EGR valve position sensor voltage is abnormally high. The sensor receives 5 volts from the engine manage computer system and returns a portion of this voltage based on pintle, or valve plunger, position. The feedback voltage varies from high to low as the valve transitions from closed to open. An abnormally higher voltage can outcome in the valve failing to open or move properly, a faulty position sensor, or possibly a wiring fault.
According to Identifix, a hugely helpful qualified information database, about 95 percent from the time, renewal in the Town and Nation EGR fixes the P0406 trouble code. What seems to take place most is actually a fault within the feedback sensor, or the valve fails to move because it should. To really make certain with the precise cause of the fault, an expert grade scan tool is necessary to command the valve while observing position sensor signals. If the valve fails to move, methods are taken to identify the lead to. When the valve moves (engine idle becomes really rough), however the sensor voltage remains higher, tests are run to figure out in the event the trigger will be the sensor or circuit.
I commonly cringe at the believed of throwing components at a automobile due to a difficulty code, but within this case it appears affordable. Before ordering a replacement EGR valve, check the electrical connector of the existing one particular for looseness or corrosion. And if renewing the aspect, be sure you use a high-quality, snug-fitting 8mm socket, as the bolt heads are simple to round off.
view a lot more about car diagnostic tools.