Question about 2000 GMC Jimmy

1 Answer

Po147 - 2000 GMC Jimmy

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 17,970 Answers

P0147 - 02 Sensor Heater Circuit Malfunction (Bank I Sensor 3)

O2 (Oxygen) sensors contain a heating element that allows the sensor to reach operating temperature quickly. This lowers emissions since it allows the engine to reach closed loop faster and also allows the engine to stay in closed loop at idle. The heater circuit is supplied a 12 V battery feed from the PCM or ignition circuit (depending on model) and a ground. The PCM (powertrain control module) monitors how long it takes for the sensors to become active after engine start-up. If it takes too long for the o2 sensors to reach operating temperature, this P0147 can set.

Symptoms: For this particular o2 sensor, there may be no noticeable symptoms other than:
* MIL (Malfunction Indicator Lamp) illumination
* Poor/ rough idle

Causes: Potential causes of an P0147 code include:
* Bad o2 sensor heater circuit
* Bad o2 sensor
* Wiring harness problems

Possible Solutions: Unplug the Bank 1, 3 sensor. With KOEO (key on engine off) use a voltmeter to check for battery voltage present at the o2 sensor connector (PCM side). (You can also do this with a test light. Connect to ground and touch lead to heater circuit supply. Light should illuminate with KOEO) You should have battery voltage present.

a. If voltage is present, check the ground side of the heater element also making sure a good ground is present. If it is, check for any faulty connections & then replace the o2 sensor. If you don't have a good ground, then there is an open in the ground circuit somewhere that will need to be repaired. Look for wiring harness contact with exhaust components or broken/missing connectors, etc.

b. If battery voltage isn't present with KOEO, check for a blown fuse supplying the heater elements. You may need to get a wiring diagram for this. If the fuse is blown, you'll need to check for a short to ground on the battery supply circuit before replacing the fuse. If you find none, and replacing the fuse re-establishes battery voltage at the o2 sensor connector, then the o2 sensor may have shorted internally, blowing the fuse. Replace it & recheck. (NOTE: it's possible for an o2 sensor's heater circuit to be open/shorted and the o2 sensor to still function).

c. If you have no battery voltage present with KOEO and there are no blown fuses supplying the heater circuit, then check for an open on the supply circuit. You can do this by ohming the circuit with the o2 sensor unplugged and the PCM unplugged. Repair and recheck.


Hope helps (remember to rate this answer).

Posted on Dec 31, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Ox heater circuit bank 1 sensor 3 code po147


Normally you have one sensor in front of and behind the catalytic converter. And most Ford products have two cats. On your Ford you may have one in front on each bank and then one after the cat.
Number 3 would be after the cat converter.

Jan 21, 2013 | Cars & Trucks

2 Answers

2003 Ford Windstar Service engine light on. Fault code is PO147. Where do I start to DIY?


Common Problems That Trigger the P0147 Code

  • Defective Rear Most Oxygen Sensor
  • Faulty Rear Most Oxygen Sensor wiring or connections
  • Exhaust leak in front of rear oxygen sensor

Jun 07, 2011 | 2003 Ford Windstar

1 Answer

Check engine light on 2000 chevy blazer tested as PO147 02 heater circuit


P0147 02 Sensor Heater Circuit Malfunction (Bank I Sensor 3) check this link for detailed explanations http://www.obd-codes.com/p0147 please take a moment to rate my reply and research Thanks Good Luck

May 08, 2011 | Chevrolet Blazer Cars & Trucks

1 Answer

A3 audi sports line fault code of po147 what is this


It's an 02 sensor (oxygen sensor) fault. One if your 02 sensors is bad and/or catalytic converter is bad.

Mar 11, 2011 | Audi A3 Cars & Trucks

1 Answer

Po147 sensor 02 whear is it


bank 1 is where # 1 plug is at on v6-v8- v10, as far as po147 goes, call auto zone and they will tell you witch one it is.

Nov 12, 2010 | 2002 Chevrolet Blazer

2 Answers

Diagnostic code PO147 came up on my 98 chevy blazer, said it is a sensor heater circuit malfunction. I asked at the parts store, they don't know what a sensor heater is. Please advise. Thanks in...


Its HO2S HEATER CIRCUIT BANK 1 SENSOR # 3 its the one after the catailitc convertor its called a down stream There 4 all together 2 on the y pipe one each side one before the cat and one after the cat thats the one you need to replace hope this helps

Nov 05, 2010 | 2002 Chevrolet Blazer

1 Answer

Code PO147 02 heater circuit, bank 1 sensor 3 where is it located. 1996 camaro 3.8


basically it means the 02 sensor on bank 2 detected a lean condition. on v-6/ v-8/ v-10 is usually the side of the engine that does not have cylinder #1. In the vast majority of cases, simply cleaning the MAF sensor does the trick. also check vacuum lines. you can buy maf sensor cleaner at mostly all auto parts stores. just follow directions on can. check the maf sensor first.

Nov 01, 2010 | 1996 Chevrolet Camaro

1 Answer

Where is the O2 senser for engine code po147


I believe it's the O2 sensor after your Cat on the driver's side of the car. I believe your car should have a duel exhaust system and should have 6 O2 sensors.

Oct 05, 2009 | 1998 Chevrolet K1500

2 Answers

Where is the #3 bank 1 oxygen senser located on the exhaust system of my 1999 chevy s10 4x4 4.3 liter v6 pick up?


The oxygen sensor is located in the flow of exhaust and there will be two. the first is at the exit of the exhaust manifold where the head pipe attaches before the converter and the other is just after the cat converter.



c3a6bef.jpg






Sep 10, 2009 | Chevrolet S 10 Cars & Trucks

Not finding what you are looking for?
2000 GMC Jimmy Logo

1,137 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...