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Codes P0030, P0128, P0035, P0030 and P0035

Tiny
DANIEL MCCULLOUGH
  • MEMBER
  • 2006 CHEVROLET TRAILBLAZER
  • 4.2L
  • V6
  • 2WD
  • AUTOMATIC
  • 134,307 MILES
My vehicle is throwing five codes two that are the same. P0030, p0128, p0035, p0030 and p0035 in that order. I am just wondering where I should other? Is one more common than the other?
Friday, April 12th, 2019 AT 2:57 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
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Friday, April 12th, 2019 AT 3:40 PM
Tiny
DANIEL MCCULLOUGH
  • MEMBER
  • 7 POSTS
Sorry that was p0135 HO2S sensor heater circuit malfunction bank 1 sensor 1.
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Friday, April 12th, 2019 AT 3:52 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
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Friday, April 12th, 2019 AT 3:55 PM
Tiny
DANIEL MCCULLOUGH
  • MEMBER
  • 7 POSTS
Thank you very much. Going to change the thermostat first and go from there.
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Friday, April 12th, 2019 AT 3:59 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds like a plan.

You're welcome.

Always glad to help.

Roy
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Friday, April 12th, 2019 AT 4:00 PM

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