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Possible Causes for DTC P0158:

(K243) O2 2/2 SIGNAL CIRCUIT SHORTED TO VOLTAGE(K904) O2 RETURN (DOWNSTREAM) CIRCUIT SHORTED TO VOLTAGE(K243) O2 2/2 SIGNAL CIRCUIT SHORTED TO THE (K399) O2 2/2 HEATER CONTROL CIRCUIT(K243) O2 2/2 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE(K904) O2 RETURN (DOWNSTREAM) CIRCUIT OPEN OR HIGH RESISTANCE2/2 OXYGEN SENSORPOWERTRAIN CONTROL MODULE (PCM)


Here is the info for the P0325:

Causes

A code P0325 most likely means one or more of the following has happened:

  • The knock sensor is faulty and needs to be replaced
  • There is a wiring short/fault in the knock sensor circuit
Possible Solutions


  • Check the resistance of the knock sensor (compare it to factory specs)
  • Check for broken/frayed wires leading to the sensor
  • Replace the knock sensor



Hope this helps in fixing your codes....



BTW, welcome to the 'Z', from Virginia, glad to have you here with us.
 
I think Dave hit it right on the head.

To translate that first one, it's an O2 sensor DTC and usually means one of the sensors has failed, a connector has come loose or the wiring has a short in it.
 
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