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Codes: P1572, P0139, P1147

How do i fix these problems myself. i have 67000 miles on my vehicle.

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  • 202 Answers

P1572 is a faulty brake switch ,,,, if its faulty the engine control unit thinks you are braking and it cuts down power,,,,

Posted on Nov 23, 2013

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Posted on Jan 02, 2017

  • 115 Answers

SOURCE: P0139 code for a 2003 hyundai elantra. What is this code?

Hi the code P0139 is Bank 1 sensor 2 lambda sensor fault ,possible wiring or sensor fault even if you replace the sensor you need to have the MIL lamp turned off by a Diagnostic machine,it is possible you have another fault such as poor Catalytic converter efficency giving the same fault code ,Would recomend you get the car checked and read the "live" data as the car see`s it to make an accurate diagnosis and cure

Posted on Jul 10, 2009

ZJLimited
  • 17970 Answers

SOURCE: 2002 nissan maxima showing codes

P0430 - Catalyst System Efficiency Below Threshold (Bank 2)

Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

Symptoms: You will likely not notice any drivability problems, although there may be symptoms such as a rough/hard idle when cold.

Causes: A code P0430 may mean that one or more of the following has happened:
* The catalytic converter is no longer functioning properly
* An oxygen sensor is not reading (functioning) properly
* There is an exhaust leak

Possible Solutions:
* First, inspect for exhaust leaks.
* Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it.

One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.



P1572 - ASCD Brake Switch Circuit Malfunction
For check ASCD BRAKE SWITCH POWER SUPPLY
- Turn ignition switch OFFDisconnect ASCD brake switch (2) harness connector Stoplamp switch (1) Turn ignition switch ON
- Check voltage between ASCD brake switch terminal and ground under the following conditions with CONSULT-II or testerCONDITION VOLTAGE Battery voltage Approx. 0V

More than likely the brake pedal cancellation switch is bad.

Keep us updated.

Posted on Feb 01, 2011

ZJLimited
  • 17970 Answers

SOURCE: 2002 nissan maxima, check engine

About DTC P1800, I suggest check the harness and verify it is plugged in and still functioning. Also, try checking your vac tubes to verify that they are not reversed. Also read this TSB with details about correct diagnostic: DTC P1800 VIAS CONTROL SOLENOID VALVE

The VIAS control solenoid valve cuts the intake manifold vacuum signal for power valve control. It responds to ON/OFF signals from the ECM. When the solenoid is off, the vacuum signal from the intake manifold is cut. When the ECM sends an ON signal the coil pulls the plunger downward and feeds the vacuum signal to the power valve actuator.

DTC detecting condition:
• An excessively low or high voltage signal is sent to ECM through the valve
Possible cause:
• Harness or connectors (The solenoid valve circuit is open or shorted.)
• VIAS control solenoid valve

Will need replaced the solenoid valve (P/N - 149558J10A). The valve is located under the engine cover. It's a Nissan only part so you have to order from the dealer, either online or in person. It's cheaper online. Check this sample Nissan engine location (click image for zoom)...

zjlimited_1658.jpg



DTC P1147 - Bank1 Sensor 2 O2 sensor maximum voltage monitoring
Component Description: The heated oxygen sensor 2, after three way catalyst, monitors the oxygen level in the exhaust gas on each bank.

Even if switching characteristics of the heated oxygen sensor 1 are shifted, the air fuel ratio is controlled to stoichiometric, by the signal from the heated oxygen sensor 2.

This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions the heated oxygen sensor 2 is not used for engine control operation.

DTC detecting condition: The maximum voltage from the sensor is not reached to the specified voltage.

Possible cause:
Harness or connectors (The sensor circuit is open or shorted)
Heated oxygen sensor 2
Fuel pressure
Injectors

Majority of cases this is either a faulty O2 sensor, or short/open in wiring harness. Bank1 sensor2 is the rear O2 sensor on the passenger (right) hand side (click image for zoom):

zjlimited_50.png

Here is simple test with voltmeter to test O2 sensor. If it fails test, replace sensor. If not, then you will have to start tracing the wiring harness for a short/open in it (click for zoom):

zjlimited_51.png

And here additional details: DTC P1147 O2 Sensor

Keep us updated.

Posted on Aug 01, 2011

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3 Answers

PO-139 I had that sensor change 3 weeks ago and the check engine light came on again this morning.Thanks


Probably replaced a good sensor. This codes could be from a bad sensor, a vacuum leak, or an exhaust leak before the sensor.

Dec 01, 2015 | 2006 Hyundai Tucson

2 Answers

The engine stalls. A P0139 code is stored. What's wrong?


Causes
A code P0139 may mean that one or more of the following has happened: The oxygen sensor is faulty The wiring to the sensor is broken / frayed There is an exhaust leak


Possible Solutions

The simplest thing to do is to reset the code and see if it comes back.

If the code comes back, the problem is more than likely the rear driver's side oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:

Check and fix any exhaust leaks
Check for wiring problems (shorted, frayed wires)
Check the frequency and amplitude of the oxygen sensor (advanced)
Check for a deteriorating / contaminated oxygen sensor, replace if necessary Check for inlet air leaks
Check the MAF sensor for proper operation





Mar 17, 2015 | 2000 Buick LeSabre

1 Answer

2002 nissan maxima showing codes p0430 and p1572. How Do I fix these problem?


P0430 - Catalyst System Efficiency Below Threshold (Bank 2)

Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

Symptoms: You will likely not notice any drivability problems, although there may be symptoms such as a rough/hard idle when cold.

Causes: A code P0430 may mean that one or more of the following has happened:
* The catalytic converter is no longer functioning properly
* An oxygen sensor is not reading (functioning) properly
* There is an exhaust leak

Possible Solutions:
* First, inspect for exhaust leaks.
* Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it.

One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.



P1572 - ASCD Brake Switch Circuit Malfunction
For check ASCD BRAKE SWITCH POWER SUPPLY
- Turn ignition switch OFFDisconnect ASCD brake switch (2) harness connector Stoplamp switch (1) Turn ignition switch ON
- Check voltage between ASCD brake switch terminal and ground under the following conditions with CONSULT-II or testerCONDITION VOLTAGE Battery voltage Approx. 0V

More than likely the brake pedal cancellation switch is bad.

Keep us updated.

Feb 01, 2011 | 2002 Nissan Maxima

1 Answer

I have got a problem with my 2007 model subaru impreza, i do not know what happened but it has deleted my dashboard dump!! gives error code p1572, and car doesnt start how can i fix this problem


well this code doesnt show under subaru and on generic codes it shows as

P0572....Cruise Control/Brake Switch A Circuit Low, which i dont think is your problem so i would hazard and say that something serious has gone wrong like the ECU unit and its thrown the immobilisor on so i think you will have to have the vehicle taken to a dealer and be prepared for a nice big bill

Jan 27, 2011 | Subaru Impreza Cars & Trucks

1 Answer

2006 Toyota Sienna just got Check engine/servie Light at 67000 miles. Is this a regularly scheduled service light?


Verify that check light engine if you have to connect a scanner OBD2 code for you and you can determine which is the sensor that has problems

Jun 22, 2010 | 2006 Toyota Sienna

2 Answers

P0139 code for a 2003 hyundai elantra. What is this code?


Hi the code P0139 is Bank 1 sensor 2 lambda sensor fault ,possible wiring or sensor fault even if you replace the sensor you need to have the MIL lamp turned off by a Diagnostic machine,it is possible you have another fault such as poor Catalytic converter efficency giving the same fault code ,Would recomend you get the car checked and read the "live" data as the car see`s it to make an accurate diagnosis and cure

Jul 10, 2009 | Hyundai Motor 2003 Elantra

1 Answer

Maintainance list for 2004 Scion TC with 67000 miles


at 67000 just an oil change and tire rotation are done, the majors are 15k 30 k.......every 15k miles. Not a major is done at 67000.

May 11, 2009 | 2004 Scion Tc

1 Answer

Nissan pathfinder -service engine soon light on


ALL those codes at once ! When was it last in for service? Haven't recently filled up with gas somewhere different by chance? First thing I'd do is add some fuel additive with moisture remover, and system cleaner, and see what that does, if you can still drive vehicle without too much trouble. What & when exactly did all this start, and what is vehicle doing?

Jan 25, 2009 | 2002 Nissan Pathfinder

1 Answer

Error codes 131,139, just got back from dealer 1500.00 to fix. Wanted to know what errors were so I could repair myself


P0131 - O2 SENSOR CIRCUIT LOW VOLTAGE BANK 1 SENSOR 1
P0139 - O2 SENSOR CIRCUIT SLOW RESPONSE BANK 1 SENSOR 2

I'm guessing that you need a new catalytic converter. $1500 bones seems like a lot of moola to me, but then I've never done one on a minivan.

Jul 07, 2008 | 2005 Pontiac Montana SV6

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