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O2 Heater Circuit Po147 Bank1 #3 GMC Sonoma - 1997 GMC Sierra

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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

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Posted on Jan 02, 2017

edwardjwoods
  • 372 Answers

SOURCE: my truck

The o2 sensors in that truck are heated. You probably have a bad o2 sensor if you have a code for a 02 heater

Posted on Aug 18, 2008

tripletauto
  • 1450 Answers

SOURCE: 1996 GMC Sonoma heater core

the dash has to come out

Posted on Sep 11, 2008

dnewcombe1
  • 1564 Answers

SOURCE: Replacing heater core in 2000 GMC sonoma. Dash is

If the dash is removed you've saved about 9 10ths of the job endurance. Look around, what you believe to be, the perimeter of the heater box. I cannot, and no one else can, tell you exactly where the bolts and nuts that mount the heater box are. Therefore you must viually sixe the box and check outide in the engine compartment and inside under the dash for the mounting bolts.You'll want to start by removing the heater hoses. Then starting at the passenger side engine compartment look for a group of 10mm or 7/16ths nuts retaining the housing and remove them. Do the same inside. The housing is usually held together with screws or clips, it changes year to year. Keep a log or pix of the wires and cables and hoses(vacuum) that are connected to the housing for reassembly. You'll need to "roll" the box out from under the dash depending on how much of the dash has been removed. The core is easy to spot for is has two hoses sticking out, and, is encircled with clips or screws . Also make sure you remove the bracket around the two entry hoses if it has one. Thank you, Dana

Posted on Oct 04, 2009

michigan man
  • 3533 Answers

SOURCE: Heater does not work

first make sure you have anti-freeze in it and there is no air bubbles in the system and if you are talking about the blower motor make sure all of wires are good and the temp limited switch next to the blower motor is good give these websites a try www.alldatadiy.com and www.autozone.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your truck wish you the best of luck Michigan Man.

Posted on Jan 31, 2010

emissionwiz
  • 75005 Answers

SOURCE: 92 gmc sonoma fuel regulator

These are all separate parts.

Posted on Jun 06, 2012

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3 Answers

What trouble code deffanition 147


DTC 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.

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

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.

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Feb 28, 2012 | 2001 Cadillac DeVille

1 Answer

2003 GMC Sonoma 81000 miles 4.3l engine PO155 error code. I cleared it, but it came back 4 days later while driving around town. Should I replace the sensor?


CODE PO155 - HO2S 21 BANK 2 SENSOR 1 HEATER CIRCUIT MALFUNCTION CONDITIONS.CHECK O2 SENSOR FUSE AND WIRING CRCUIT BEFORE BUYING A NEW HO2S.IF SENSOR BAD REPLACE IT.THEN YOU CAN CLEAR THE CODE.

Aug 19, 2011 | 2003 GMC Sonoma Extended Cab

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

02 sensor heater circut malfunction


htr ckt malfunctions are mostly due to worn or faulty htr elements in ur sensor. i would first chek all ur fuses to make sure u even have voltage going down to ur o2 sensr, if they check out good then safe to say ur o2 sensr is faulty an should b replaced....good luck

May 01, 2011 | 2003 GMC Sonoma Extended Cab

1 Answer

I have a 99 gmc sonoma 2.2L running bad spits and sputters and dies alot these 2 codes pop up p0171 and 02htr what are they thanks


P0171 is a lean Oxygen Sensor code. It is trying to tell you that your engine is running lean...not getting enough fuel, or getting too much air. That will cause the poor running and dying. This is most likely caused by a bad vacuum leak. The O2 heater code is probably caused by a failed O2 sensor heater. Sometimes it is caused by an open or short in the O2 sensor circuits, but most of the time it is the sensor itself.

Feb 13, 2011 | GMC Sonoma Cars & Trucks

1 Answer

Po147


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).

Dec 31, 2010 | 2000 GMC Jimmy

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

4 Answers

The heater still won't work after I changed the thermostat on my


Get a female garden hose adapter from the local hardware store. Disconnect the heater hose from behind the fan pulley and attach the hose connection. Disconnect the other heater hose behind the alternator, aim it towards the ground and flush water through the heater core. This worked on my truck.

Feb 12, 2009 | 1999 GMC Sonoma

1 Answer

My truck


The o2 sensors in that truck are heated. You probably have a bad o2 sensor if you have a code for a 02 heater

Jun 27, 2008 | 2006 GMC Sierra

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