What Are These Codes? P0135 & P0155

[Notrega]

I changed the oil and got these codes...

Drove a bit and when I restarted they weren't there

 

[stamp11127]

p0135 - Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

p0155 - 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

Read more at: http://www.obd-codes.com

Worry about it if they come back.

 

[2005exp]

Delete

 

[Notrega]

p0135 - Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

p0155 - 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

Read more at: OBD-Codes OBD-II Trouble Codes - DTC Codes Car Repair

Worry about it if they come back.

Thanks

If it does what am I looking at as for repair or danger/damage?

 

[stamp11127]

It all depends on what is wrong and your abilities. How are you at being a mechanic?

 

[Bedrck47]

P0135 - HO2S Circuit Malfunction (HO2S-11)
Description: During testing the heated oxygen sensor (HO2S) heaters are checked for opens/shorts and excessive current draw. The test fails when the current draw exceeds a calibrated limit and/or an open or short is detected.
Possible Causes: Vacuum hose disconnected on EGR system module (ESM) applications.
Short to VPWR in the harness or HO2S.
Water in the harness connector.
Open VPWR circuit.
Open GND circuit.
Low battery voltage.
Corrosion or poor mating terminals and wiring.
Damaged HO2S heater.

P0155 - HO2S Circuit Malfunction (HO2S-21)
Description: See the description for DTC P0135.
Possible Causes: See the possible causes for DTC P0135.
Diagnostic Aids: See the diagnostic aids for DTC P0135.

 

[2005Expedition]

I had the same code not too long ago, turn out the preview owner put a wrong o2 sensor in. it been over month and 1300 miles round trip and no CEL , Knock on wood