That was quick
Good work on getting down to CKP(crank shaft position) sensor as the problem
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
Cat Converter needs to be replaced
There is an O2 sensor just after the Cat(downstream sensor), it's readings are compared to the O2 sensors nearer the engine(upstream sensors), if Cat is not cleaning up the exhaust enough then you get this code.
P1443 Evaporative Emission System Control Valve (low/no flow)
EVAP system needs attention could be vacuum hose has cracked or otherwise leaking.
EVAP system uses engine vacuum(intake) to suck air(fuel vapors) out of the fuel tank thru a charcoal filter and into the engine.
It is what gives you that hissing sound when you remove the gas cap to fill up, you probably haven't heard that in awhile, if you have then could be bad pressure sensor.
Charcoal canister is usually on the rad support, bigger black box with hoses.
One hose will go back to the gas tank
Other hose will have a pressure sensor and then a Solenoid with a hose to the intake manifold.
Computer controls the solenoid, it opens it to allow engine vacuum to suck gas tank air thru the filter and into the engine, the pressure sensor tells the computer that there is vacuum present and how much.
Solenoid is a more common failure point than the sensor, but inspecting the vacuum hoses from charcoal canister to the engine is free, lol,
You can use a 9volt battery or the truck battery to test the solenoid, it will "click" open and closed when power is applied, there is no polarity on the 2 conductors it is just a coil of wire inside.
Last edited by RonD; 02-26-2016 at 10:57 AM.