Chrysler 300 P0157 and P1004 Diagnostic Guide: O2 Sensor & Short Runner Valve Issues
I'm experiencing persistent fault codes P0157 and P1004 on my Chrysler 300. Can someone please explain what these codes mean and provide guidance on potential causes and troubleshooting steps? Thank you for your help.
P0157 - O2 Sensor 2/2 Circuit Low\nPossible Causes:\n- INTERMITTENT DTC\n- (K243) O2 Sensor 2/2 Signal Circuit Shorted to Ground\n- (K904) O2 Return (Down) Circuit Shorted to Ground\n- (K243) O2 Sensor 2/2 Signal Circuit Shorted to the (K904) O2 Return (Down) Circuit\n- Faulty 2/2 Oxygen Sensor\n\nP1004 - Short Runner Valve Control Performance\nPossible Causes:\n- (F343) ASD Relay Output Circuit Open or High Resistance\n- (F856) 5-Volt Supply Circuit Open or High Resistance\n- (K235) SRV Signal Circuit Open or High Resistance\n- (K236) SRV Control Circuit Shorted to Ground\n- (K236) SRV Control Circuit Open or High Resistance\n- (K900) Sensor Ground Circuit Open or High Resistance\n- Faulty Short Runner Valve (SRV) Assembly