My check engine light is on and the code the guy at AutoZone gave me was P1400. When I looked that up it says DPFE Sensor Low Voltage, what does that

The engine check light comes on in the vehicle. Its a toyota townace 2003. it was checked out and the technician says its the oxygen sensor what does that mean?

We have a 2006 chevy monte carlo with 43000 miles. the check engine light stays on. the local chevy dealer wanted $100 just to check it out. does this need to be checked out right away or can it wait awhile....

I have a 1997 mercedes benz e400. The check engine light came on it also said engine electronics what does this mean?

I own a 1996 ford thunderbird and despite not needing a oil change my check engine light will not got off.i read a manual once that said one quirk is to tun key on three times on a cold engine.this worked once...

Small emissions leak ,what would be a small emission leak