Question about 2000 Mazda Millenia

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P0154 codes p0155 now and had a p0154 before i replaced the o2 sensor

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Check your fuses. If fuse for O2 heater circuit is good then you either have a faulty sensor or an open in the wiring check wires to make sure they aren broken. Also make sure the terminals aren't bent in the plug or pushed out.

Posted on Apr 18, 2014

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4 Answers

What does code p0155 mean


P0155 = 2/1 O2 Sensor Heater Failure, Oxygen sensor heater element malfunction. logic dictates that you replace your O2 Sensor. DIY car obd2 code scanner online shopping

Jun 05, 2014 | 2004 Chevrolet Avalanche

2 Answers

What do po155 mean?


Assuming you mean p0155 obd code is an o2 sensor heater circuit fault this could be the heater in the o2 sensor itself check for continuity or it could be a short in the wiring harness. Clear the code and see if it comes back! If you have done more than 100k miles in your car the o2 sensor is most likely due for replacement. best to confirm the fault first

Apr 14, 2014 | 1999 Chevrolet Astro

1 Answer

Trouble code p0154


code p0154 refers to heated oxygen sensor (HO2S) 1 bank 2 -- no activity detected===causes --wiring---HO2S---= ECM
it also refers to oxygen sensor (O2S) --no activity detected--===causes --- wiring---O2S sensor---ECM. May be you did not replace the sensors causing the fault.

Jan 03, 2014 | Cars & Trucks

1 Answer

Engine Service Soon Light On code P0154


Error Code: P0154
Description:
Heated Oxygen Sensor (HO2S) 1 , Bank 2 - No Activity Detected
Problem areas:
- Wiring.
- Open circuit in signal wire, between Heated Oxygen sensor 1, Bank 2 and ECM. (Must check and confirm)
- Heated oxygen sensor (HO2S).
- Engine control module (ECM).

Nov 20, 2013 | 2003 Mitsubishi Montero Sport

1 Answer

I'm thinking about buying a 2002 range rover. It has a service/check engine codes of 134,135,155. Is it likely to be more than oxygen sensor problems? Please reply , Mel


with those codes showing, it could be either bad O2 sensors or there is a problem with the wiring to those sensors. Also, the wrong sensors may be installed. I'm assuming codes P0134, P0135, P0155.

For others viewing this:

P0134 = O2 sensor circuit-no activity detected (bank 1 sensor 1)

P0135 = O2 sensor heater circuit malfunction (bank 1 sensor 1)

P0155 = O2 sensor heater circuit malfunction (bank 2 sensor 1)

Feb 11, 2011 | 2002 Land Rover Freelander

2 Answers

I have a 2003 3.0 engine Honda Accord that is giving me trouble codes P2197 P0154 P2254, what do these mean? Thank you.


Here it goes.
P2197 - Front Air Fuel Sensor (O2 sensor) Bank 2 - Sensor 1 Signal stuck lean.

P0154 - Front Air Fuel Sensor (O2 Sensor) Bank 2 - Sensor 1 Heater System Malfunction.

P2254 - Front AIr Fuel Sensor (O2 Sensor) VS Line high voltage.

IF Trouble codes P0134 or P0154 are present diagnose them before code P2254.

The first thing I would do would be check the heater circuit. You will have ground, and 12V+ to the 02 sensor heater line on a cold start. This heats up the oxygen quicker and allows it to operate in the correct amount of time. 9/10 times if there is a heater circuit code it is the oxygen sensor. But 1/10 times it is a blown fuse. So checking the voltage at the sensor is a quick test for P0154.

I would backprobe the signal line when the vehicle is at a full operating temp with a graphing meter (if avail) or use a DVOM. You should see it switch between .1 volts to 1V. It should not continuously move up and down. This indicates the computer is in good fuel control.

Diaginosis the heater circuit first is best because code P2197 can be set from anything that can cause that motor to run lean. (Plugged fuel filter, low fuel pressure/volume, vacume leak).

Hope this gives you a solid path to go on & good luck.

Nov 16, 2009 | 2003 Honda Accord

1 Answer

Ive got a question for a 1997 chevy tahoe. i need to find out which o2 sensor to change when a DTC codes register with P0155 AND P0154. can anybody help me?


P0155 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
THIS IS THE SENSOR BEFORE THE CAT CONVERTER
P0154 02 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)
SAME SENSOR, WHEN THEY SAY BANK 2 IT IS THE BANK OF CYLINDERS OPPOSITE THE BANK THAT HAS #1 CYLINDER IN IT,
MAKE SURE THE SENSOR IS CONNECTED AND THAT THE CONNECTOR IS NOT DAMAGED.

May 01, 2009 | Mitsubishi Montero Cars & Trucks

1 Answer

Failed Smog Test - 4 codes for 2001 Isuzu Rodeo


Tune it up and replace the 02 sensor that keeps setting the codes bank 2 sensor 1. Have your oil and filter changed right before you go for a retest to. That will clear up 3 codes P0300, 0155 and 0154. You might have to replace the fuel sending unit to get rid of P0463 but if the gauge works OK I'd leave it alone.

Jan 12, 2009 | 2001 Isuzu Rodeo

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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