Replaced evr solenoid,dpfe sensor code p1401 comes up still cant find the problem could the ecm be my problem the evr solenoid was leaking vacuum past it constantly the dpfe sensor had a diaphram that was blownout but i stillget the codep1401
SOURCE: Please Help... p0404 and p0137 Error Codes (1999 Saturn SL1)
hey if you truely think it is your egr valve unhook it and if that is the problem then when it is unhooked it should run better and the codes should not come up. hey if you cahnged the 1 o2 sensor and not the other you probably made the code for the one u repalced come up again. i would recommened that you change both of the o2 sensors at the same time. try checking if your catalatic convert is plugged. how you do this is take a dollar bill and hold it at the end of your tail pipe while it is idleing and if the dollar bill stays still you have a plugged catalatic converter.
SOURCE: car revving when starting or idling sometimes. i
try servicing the idle air control (iac) sensor with some wd40, watch out for the gasket and seal
SOURCE: 2000 SATURN SL 1.9 TWIN CAM-PO171 CODE
The code p0171 is a vac, leak. I would check all the vac, lines first. If they all look good, then the one thing I have ran across alot is the intake manifold will **** air in from the outside. Most of the time it will leak at #1 cylinder. Get a can of brake clean or carb cleaner with the engine running, spray around the intake and see if the engine stumbles. If it does then you have your vac. leak. Keep us posted.
SOURCE: I have a 2006 Saturn Ion 2. My check engine light
Remove the housing that covers the engine block and look behind the engine block, up against the firewall towards the bottom of the block there are some vaccum hoses(this is easier to get too if the car is up in the air, or lifted on jack stands) get yourself a aerosall can of brake cleaner and lightly spay around all the hoses til you find your leak( the vehicle must be running) be very careful cause the fluid you spray can catch fire if it hits the exhaust manifold when it gets hot. good luck
SOURCE: put my 1993 Saturn SL2
same thing on my 94 turned out to be bad MAP sensor.
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COMPONENT TESTING
DPFE Sensor
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