Question about 1999 Chevrolet Astro

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It has a code p0155 &po155pd what is the problem?

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That is an O2 sensor error code. Before replacing the O2 sensor for $100-$150, try using fuel injector cleaner in a new full tank of gas twice all the way to empty. Clear the code, if it hasn't cleared itself (older models sometimes will not clear themselves) and see if it comes back. If it doesn't then you are good. But, if it is a really old sensor it may need to be replaced.

Posted on Apr 14, 2014

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P0155 error code Mitsubishi diamante 2002 where is it located the sensor


P0155 is not telling you which part is defective, it is saying there is a problem in the system and that the triggers the fault code. In this case you have a O2 sensor whose heater is not heating. This may be the senor or the wiring to it.
P0155 OBD-II Trouble Code: 02 Sensor Heater Circuit Malfunction in cylinder Bank 2 (V6 only), Sensor 1, this is the sensor before the catalyst.

Oct 12, 2016 | Mitsubishi Cars & Trucks

2 Answers

What else, Check Engine Light, P0505, p0135, p0155, p1494 codes?


You can not work on a vehicle as your doing

Your checking for generic codes only & throwing
parts at it

You get a couple possible worn or failed parts & have
a few less codes

There is no need to clear ALL Data every time you change a part

You need to STOP

You need professional scan tool software to look at ALL data & go for a road test first

You keep clearing stored data ,so now the process will take longer

You work one code & one system at a time

NO PARTS get replaced that are not tested & found to fail
a test,thus a worn out part.

You need both Factory Emission & Diagnostic Manual, as well
as Wiring Diagram Book-- BEFORE-- you can even walk to the vehicle (Helm.Com)

You have nothing to go by,no system knowledge & no trouble charts,& no wiring diagrams to start your testing

If you got no scan tool & no volt meter & no oscilloscope,
your done,vehicles have to be tested to find a problem,any
problem,resolve it & continue on.

May 19, 2014 | 2004 Jeep Grand Cherokee

1 Answer

I have p0155 code for oxygen sensor


P0155 CHEVROLET - HO2S Heater Performance Bank 2 Sensor 1

Replace the cylinder back sensor.

Jun 13, 2013 | 2001 Ford Escape

1 Answer

Why the codes po125 & po135 &po155 keep coming back?


Hi there:

DTC P0125 - Insufficient Coolant Temperature For Closed Loop Fuel Control

The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is likely going to be the result of the above causes (faulty thermostat, faulty ECT sensor, or a low coolant level).


DTC P0135 - Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
or
DTC P0155 - 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

A code P0135 and P0155 may mean that one or more of the following has happened:

  • O2 Heater element resistance is high
  • Internal short or open in the heater element
  • O2 heater circuit wiring high resistance
  • open or short to ground in the wiring harness

In order to solve just...
  • Repair short or open or high resistance in wiring harness or harness connectors
  • Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)


  • Hopoe this helps.

    Aug 28, 2012 | 1999 Toyota Sienna

    1 Answer

    Code p0155


    code p0155 is O2 sensor heater circuit
    ____________________________
    Good news: get BDM100 ECU Programmer Reader ECU Flasher V12.55 FOR FREE when you purchase the FGTech Galletto 2-Master

    Aug 01, 2012 | 2002 Toyota Highlander

    1 Answer

    I've got a 2003 F150 5.4L with 114K. Recently had the 100K service done at about 105K (plugs & boots, fuel system flush, coolent flush, tranny flush). Wife left for grocery store and said truck was...


    Code P0155, 1155, will get those code's with vacuum leaks, I have seen that many times here at my repair shop, many times customers come in, after they have done a tune-up, as you have, and same problem, check for vacuum leaks, more so on top of engine to the back, by fire wall.

    Sep 16, 2010 | 2003 Ford F150 Regular Cab

    1 Answer

    1997 Maxima getting codes P0150, P0155 changed O2 sensor still getting codes after erased and driven... please Advise


    CODE P0155 IS O2 HEATER FAULT MOST LIKELY CAUSE IS WIRING, GROUND CONNECTIONS ,POSSIBLE ECM .

    Aug 06, 2010 | 1997 Nissan Maxima

    2 Answers

    EMISSION FAIL CODES PRESENT P0155


    P0155 - Heated Oxygen Sensor Heater Circuit (bank 2, sensor 1)

    bank 2 sensor 1 (front, driver side) o2 sensor needs to be replaced

    Oct 15, 2008 | Mitsubishi Montero Cars & Trucks

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