Codes po325, po420, and po118

Good evening,

The 420 is for a catalytic converter. It needs to be replaced.

The 325 is for the knock sensor and the possibilities need to be checked.

The 118 is the coolant sensor. That could be the failure.

Roy

P0325
Descriptor
Knock Sensor #1 Circuit
Probable Causes
Good Trip Counter Equal to Zero
Intermittent Condition
Knock Sensor (KS)
Knock Sensor (KS) 1
Knock Sensor (KS) Circuit Shorted to Ground
Knock Sensor (KS) Circuit Shorted to Voltage
Knock Sensor (KS) Return Circuit Open
Knock Sensor (KS) Signal Circuit Open
Knock Sensor (KS) Signal Circuit Shorted to (K45) Knock Sensor (KS) Return Circuit
Powertrain Control Module (PCM)

P0118
Descriptor
Ect Sensor Voltage Too High
Engine Coolant Temperature Sensor High
Probable Causes
Engine Coolant Temperature (ECT) Sensor
Engine Coolant Temperature (ECT) Sensor Internal Failure
Engine Coolant Temperature (ECT) Sensor Signal Circuit Open
Engine Coolant Temperature (ECT) Sensor Signal Circuit Shorted to Battery Voltage
Engine Coolant Temperature (ECT) Sensor Voltage Above 4.9 Volts
Intermittent Condition
Powertrain Control Module (PCM)
Sensor Ground Circuit Open

Hello,

In the diagrams down below I have included the guides from the factory on how to troubleshoot the DTC's listed above. I have included the factory diagnostic troubleshooting guides for DTC's P0118, P0325, and P0420. Please go through them and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros