Trouble code P0405 means:Exhaust gas recirculation sensor A circuit low
Trouble code P0405 means: EGR Position Sensor Circuit Low Input
The P0405 code on a Saturn indicates an issue with the Exhaust Gas Recirculation (EGR) sensor circuit A. This could be caused by a faulty EGR sensor, damaged wiring, or a poor connection. It is important to diagnose and repair the root cause to prevent potential engine performance issues.
it a transmission slipping code
P0405 Exhaust Gas Recirculation Sensor A Circuit Low
Diagnostic trouble code
The diagram is in your owners manual.
There are dozens of codes. Be specific as to what code you are getting.
Trouble code P0342 means:Camshaft position circuit low input
Trouble code P0102 means: MAF Sensor Circuit Low Frequency
Trouble code P1345 means: Camshaft To Crankshaft Position Correlation Fault
p0405 EGR position sensor input below the minimum acceptable voltage range (shorted low) *Clean or replace the EGR *Replace the DPFE *Clean the throttle body *Clean the MAF - use electrical contact cleaner and be gentle