Sensor a circuit low code p0405 - 2006 Jaguar X-Type

Question edited for clarity and spelling of model name.
Question moved to model category.

Information here. You can probably just clean it.

https://www.700r4transmissionhq.com/p0405-buick-rendezvous/

Location

https://www.google.com/search?q=2002+Buick+Rendezvous+EGR+Location

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P0405 means Exhaust Gas Recirculation Sensor A Circuit Low. It may caused by Short to ground in EGR signal or Reference circuits or voltage in EGR ground or signal circuits;Bad EGR valve; or Bad PCM wiring issues due to chafing or loose terminals.
P0300 is Random/Multiple Cylinder Misfire Detected. It may be something wrong with spark plugs or wires,coil,oxygen sensor,fuel injector,etc.
As for P2670, it seems for the Actuator Supply Voltage "B" Circuit Low.

greetings

CODE PO134 - HO2S 11 BANK 1 SENSOR 1 INSUFFICIENT ACTIVITY CONDITIONS. CODE PO403 - EGR SOLENOID CONTROL CIRCUIT MALFUNCTION. CODE PO405 - EGR POSITION SENSOR CIRCUIT LOW INPUT CONDITIONS. PROBLEM COULD BE THE EGR SOLENOID OR EGR POSITION SENSOR.

p0401
Exhaust gas recirculation-insufficient flow detected
p0403
Exhaust gas recirculation-circuit malfunction
p0405
Exhaust gas recirculation vave position sensor A- circuit low

hope this helps. not sure where they are located

The DTC P0405 is for (Exhaust Gas Recirculation Sensor Circuit "A" Low)

DTC P0406 is for (Exhaust Gas Recirculation Sensor Circuit "A" High)

This would indicate a problem with the EGR valve sensor, or the EGR valve itself is malfunctioning.

P0405 - Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage

You may have to replace the EGR sensor, but remove it and clean it up good to try it again first. Sometimes the pipe feeding exhaust gas up to them gets plugged.

404 is exhaust gas recirculation circuit, and 405 is exhaust gas recirculation sensor circuit low. EGR sensor or ground?

P0405-egr Position Sensor Circuit Low
check the wires at the sensor connector for loose connection,and corrosion.read voltage with volt meter,check ground wire to ensure good ground connection.If all is ok,replace part.

P0404 Exhaust Gas Recirculation Control Circuit Range/Performance
P0405 Exhaust Gas Recirculation Sensor “A” Circuit Low


It sounds like you have a failure of the EGR valve.