2002 Lincoln LS trouble codes p1421 and p1423 coming up with EGI test failure and catalyst damage where can I find definistion and description?

https://blog.bavauto.com/5929/bmw-fault-codes-p1421-p1423-secondary-air/

P1472 Electrodrive Fan 2 Operational Failure (Passenger Side)
P1225 Needle Lift Sensor Malfunction
P1227 Waste gate Failed Closed (Over Pressure)
P1226 Control Sleeve Sensor Malfunction
P1228 Waste gate Failed Open (Under Pressure)
P1421 Catalyst Damage
P1425 EGI Glow Plug Secondary Failure
P1435 A/C Refrigerant Temperature Circuit Range/Performance
You need an expert to loo into this, the dealer is the best option out there, more cost but they will fix it faster.

p1423 refers to secondary air injection system --insufficient flow detected causes hose connections---air valve--air pump
p1421 refers to secondary air injection system bank 2 insufficient flow detected. causes-- hose connections---air valve---air pump.

code p1423 secondary air injection air system bank 1 insuffient flow detected.

code P0455......... Evaporative emission system leak detected ( large leak ) check gas cap

code 1451...........secondary air system leak ( bank 2 ) check for vacuum leak

code 1423...........secondary air system leak ( bank 1 ) check for vacuum leak

code 0141...........02 sensor heater circuit ( bank 1, sensor 2 ) replace 02 sensor

its an air flow related code. possibly a cracked hose.

go to the link below, type in the code and the difinition of that code comes up in a list as defined by each car maker.

http://www.aboutautomobile.com/DTC/P1494

p1423 Secondary Air Injection Bank 1 flow too low

P0431 Warm Up Catalyst, Bank 2 Efficiency Below Threshold/Limit

P1411 Secondary air injection fault, this is related to the P1423.

I'm not sure where you got the codes... I have a Peake R5/FCX-3 - nice for diagnostics.

You should look at the various BMW forums out there - bimmerforums is a good one.

From a simple google search - Google is your friend...

I reset the CEL and it returned with just the P1421 and P1423 code. I researched the web and found that on the BMW, this is the secondary air pump for cylinders 1-3 that provides air to the exhaust during warm up. According to others, this may be due to a check valve stuck open or closed. Or, it could also be a leak in the output hose or a vacuum hose to the valves. The vacuum line runs close to the engine causing it to get brittle and crack. This 30 cents hose can cause the valve to stay closed, keeping water in the pump and eventually, corrosion to occur. I'll work on it over the weekend and post my results.

and

Low vacuum to the check valve. Found the Electric Valve Switch leaking vacuum. PN 11-74-7-537-612 $43.55.