The P1404 indicates that the EGR is staying closed.
The PO174 indicates a lean fuel trim mixture.
The PO443 deals with the purge control in the EVAP system malfunctioning.
The first two codes could be related. The EGR code is most likely the result of either a bad valve or carbon build up on the pintle. It could also require that the PCM be reprogrammed. As far as the EGR, it should be mounted on the intake manifold. Check to make sure the wiring to it is connected. If it is and it looks okay, remove the EGR and check for carbon build up. I believe if the valve is in the closed position, it could cause the computer to over compensate and run the system too lean. Thus, setting the PO174.
If that isn't the case, a PO174 can be caused by any of the following:
- Engine vacuum leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow sensor
- Incorrect Positive Crankcase Ventilation hose connection
My first guess would be a vacuum leak which can happen very easily when an engine is replaced.
As for the PO443, my guess is this is the result of the engine replacement. It can be caused by any of the following:
- Faulty EVAP Purge Solenoid Control
- EVAP Purge Solenoid Control harness is open or shorted
- EVAP Purge Solenoid Control circuit poor electrical connection
Other than the solenoid being bad, basically, this is saying there is a bad connection to it. A wire may not be connected, damaged, corroded. Since none of these things were issues before the work was done, I think you may want to contact the shop that did the work and request that they help.
Let me know if I can help in any other way.
Joe
Sunday, July 20th, 2014 AT 8:12 PM
