Codes P0030, p0128, p0035, p0030 and p0035

Good evening,

The 128 is a bad thermostat. You need to replace the thermostat.

https://www.2carpros.com/articles/replace-thermostat

P0030

P0030
Descriptor
Probable Causes
Diagnose Other DTCs First
Heated Oxygen Sensor (HO2S) 1 Heater Control Circuit
Heated Oxygen Sensor (HO2S) 1 Ignition 1 Voltage Circuit Short to Ground
Heated Oxygen Sensor (HO2S) Heater Low Control Circuit Open or High Resistance
Heated Oxygen Sensor (HO2S) Heater Low Control Circuit Short to Ground
Heated Oxygen Sensor (HO2S) Heater Low Control Circuit Short to Voltage
Heated Oxygen Sensor (HO2S) Terminals Shorted or Poor Connections
Ignition 1 Voltage Circuit Short to Ground
O2S Fuse
Powertrain Control Module (PCM)
Powertrain Control Module (PCM) Terminals Shorted or Poor Connections

Can you verify the 35 code? There is no P0035 code listed.

Roy

Sorry that was p0135 HO2S sensor heater circuit malfunction bank 1 sensor 1.

Thanks.

Below are the possibilities for the code. In most cases, it is the sensor.

Roy

P0135
Descriptor
Probable Causes
Diagnose Other DTCs First
Heated Oxygen Sensor (HO2S) Heater Low Control Circuit Open
Heated Oxygen Sensor (HO2S) Heater Low Control Circuit Short to Ground
Heated Oxygen Sensor (HO2S) Heater Low Control Circuit Short to Voltage
Heated Oxygen Sensor (HO2S) Ignition 1 Voltage Circuit Short to Ground
Heated Oxygen Sensor (HO2S) Intermittent Condition or Poor Connection
Heated Oxygen Sensor 1 (HO2S)
Ignition 1 Voltage Circuit Short to Ground
Oxygen Sensor (O2S) Fuse
Powertrain Control Module (PCM)
Powertrain Control Module (PCM) Intermittent Condition or Poor Connection

Thank you very much. Going to change the thermostat first and go from there.

Sounds like a plan.

You're welcome.

Always glad to help.

Roy