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P1487 manufacturer control auxillery emission controls

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High Speed Fan Control Relay Circuit ,try this.In a nutshell, wiring problems come down to only a few possible causes, and they are:
1. Open circuit (or partially open such as a chaffed line which causes high resistance due to heat when circuit load is on)
2. Short to power
3. Short to ground
4. High resistance (usually caused by corrosion or poor connections)

Posted on Oct 07, 2009


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What does code p0446 mean on a 2001 Buick Centry?

P0446 Evaporative Emission Control System Vent Control Circuit Malfunction The code P0446 is set when the engine computer recognizes a fault or restriction at the vent control part of the Evaporative emission control system (EVAP). The description of the fault varies between different car manufacturers, but one thing is common, the code P0446 doesn't directly point to a defective part; some testing might be required to pinpoint the faulty component. What can cause the code P0446: - faulty vent control valve - blockage at the vent hose, vent filter or vent control valve - open or short in the vent control valve circuit - bad charcoal canister - EVAP system leak - faulty EVAP system pressure sensor - bad vacuum switching valve (VSV) - stuck open purge valve (solenoid)

Aug 13, 2014 | 2001 Buick Century

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Code p1443

without knowing your make or model:

  • p1443
    Evaporative Emission Control System Control Valve
  • audi
    EGR Valve Position Sensor Signal Too Low
  • bmw
    Leakage Diagnostic Pump Control Circuit Signal High
  • ford
    EVAP Control System Purge Control Solenoid or Purge Control Valve Fault
  • hyundi
    EVAP System Tank Cap Missing
  • infinity
    Evaporative Emission Control System Control Valve
  • lexus
    Secondary Air Injection Vacuum Switching Valve Circuit Malfunction Bank 2
  • mazda
    Evaporative Emission Control System Large leak detected
  • mitsubishi
    EVAP Purge Control Valve 2 Circuit Malfunction
  • nissan
    Evaporative Emission Control System Control Valve
  • suburu
    Evaporative Emission Control System Vent Control Function Problem
  • suzuki
    EVAP Purge Control Valve Malfunction- Stuck Open
  • toyota
    Secondary Air Injection Vacuum Switching Valve Circuit Malfunction Bank 2
  • volkswagon
    EGR Valve Position Sensor Signal Too Low
  • Dec 07, 2013 | Cars & Trucks

    1 Answer

    Evaporative Emission Control System Purge Control Valve Circuit Opeat's your problem?

    Possible causes- Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted
    - Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection
    - Faulty Evaporative Emission (EVAP) Purge Solenoid Control

    Read more:

    Oct 12, 2012 | 2001 Mercedes-Benz ML 320

    1 Answer

    Does ECU mean " Emission Control Unit" isn't that the computer itself, Only the dealer can recode it?? Right!!

    ECU (engine control unit), ECM (engine control module), PCM (power train control module) VCM(vehicle control module). Basically your vehicle's computer. There are independent shops with the hability and the technology to reprogram it but for sure your manufacturer's dealer.

    Mar 15, 2012 | Dodge Grand Caravan Cars & Trucks

    2 Answers

    What does po440 on a 2003 saturn vue mean with a service engine soon light on

    That is a problem in the evaporative emission control system.
    Could be anything causing it
    Clogged filter in the charcoal canister
    A leak in one of the vacuum lines
    The purge valve not working,,,etc.
    The best thing is to take it and have it checked out, they might have to do a smoke test to find the problem.
    All they do is inject smoke into the system, if there is a leak the smoke will come out of it. All it takes is a pin hole in these emission systems to screw it all up.

    Aug 13, 2010 | 2003 Saturn VUE

    2 Answers

    I checked the codes and one comes up its po446. i dont under stand what it mean so i cant fix it to get the light to go out.

    P0446 Evaporative Emission System Vent Control Circuit.
    The following are descriptions of all Evaporative possible codes:

    P0441 Evaporative Emission System Incorrect Purge Flow
    P0442 Evaporative Emission System Leak Detected (small leak)
    P0443 Evaporative Emission System Purge Control Valve Circuit
    P0444 Evaporative Emission System Purge Control Valve Circuit Open
    P0445 Evaporative Emission System Purge Control Valve Circuit Shorted
    P0446 Evaporative Emission System Vent Control Circuit
    P0447 Evaporative Emission System Vent Control Circuit Open
    P0448 Evaporative Emission System Vent Control Circuit Shorted
    P0449 Evaporative Emission System Vent Valve/Solenoid Circuit
    P0450 Evaporative Emission System Pressure Sensor/Switch
    P0451 Evaporative Emission System Pressure Sensor/Switch Range/Performance
    P0452 Evaporative Emission System Pressure Sensor/Switch Low
    P0453 Evaporative Emission System Pressure Sensor/Switch High
    P0454 Evaporative Emission System Pressure Sensor/Switch Intermittent
    P0455 Evaporative Emission System Leak Detected (large leak)
    P0456 Evaporative Emission System Leak Detected (very small leak)
    P0457 Evaporative Emission System Leak Detected (fuel cap loose/off)
    P0458 Evaporative Emission System Purge Control Valve Circuit Low
    P0459 Evaporative Emission System Purge Control Valve Circuit High
    At least the cap isn't loose for the gas tank.

    I would clear the code with an OBD-II Scanner 'erase code' button, and see how long it takes for it to come back.

    Aug 06, 2010 | 1996 GMC Jimmy

    2 Answers

    What is the emission controlls evarorative system

    Emission control systems have been incorporated into automobiles to prevent pollution by limiting the amount of partially burned and evaporated gases into the atmosphere. These systems have been efficient in reducing the pollution caused by automobiles to a large extent. Automobiles were first manufactured with exhaust emissions control systems in 1966. Since then technology has undergone several changes that has increased the number of cars which use this technology. The emission released is calculated by quantity released per distance traveled. The types of emissions are tailpipe emissions, life cycle emissions and evaporative fuel emissions.
    Catalytic Converter
    The catalytic converter was developed in the early 70's when severe air pollution was emanate, but wasn't made mandatory by the US government until 1976. The catalytic converter or "cat" for short is one of your vehicles main emission control devices. The name was derived from the operation the catalytic converter performs, it takes a catalyst and converts the unburned gases to burned gases, "catalytic converter".
    EGR Valve
    EGR valves are used is to lower KNOX (NO2) gases which occur when the combustion chamber when temperature reaches over 3,500 degrees Fahrenheit. KNOX gases have proven to cause brain damage and have been mandatory on most vehicles since 1976. An EGR (exhaust gas re-circulation) this valve controls exhaust gases to enter the intake manifold and flow into the combustion chamber at certain times in the operation of the vehicle. To test your EGR valve remove the vacuum line that is connected to the valve, apply vacuum using a vacuum pump to the valve while the engine is running. If the engine stalls the EGR system is working, if not, the EGR valve may have failed.
    Tailpipe emissions are released as bi-products of spent fuel that is combusted inside the cylinders of the engine. These omitted gases consist of carbon monoxide, hydrocarbons, carbon dioxide and nitrogen oxides. To control tailpipe emissions measures have been taken to increasing engine efficiency. This efficiency involves technologies such as lightweight vehicle design, regenerative braking, decreased rolling resistance, increased ignition voltage, minimizing air resistance and improving power train efficiency.

    Lifecycle emissions are products which are released during the manufacturing, maintenance and disposal of the vehicle. The products include volatile solvents such as auto paint and lubricants, manufacturing plant power waste, oil filter and oil changes, heavy metals, tires, landfills, etc. These kinds of emissions are responsible for creating urban smog which consists of heavy molecular gases which pollute our environment.

    Temperature change can result in the evaporation of fuel in the tank because of the development of pressure, this is known as gas tank venting. Recently fuel systems have been equipped with a closed system called EVAP, this allows the vapor to be stored in a charcoal canister until it can condense into a liquid and then returned to the fuel tank.

    Another emission control system known as the air injection reactor or AIR, oxygen is injected in the exhaust manifold. This system decreases the bi-products of incomplete fuel consumption.

    If the emission control system malfunctions the "check engine" light will illuminate. Scan the PCM for trouble codes, repair the problem, then clear codes to re-test system. Most automobile's have an emission system information label under the hood, or consult a repair manual.

    The emission system performs regular test while the car is in use called a "test cycle". Tailpipe emission are measured in parts per million or PPM. Presently, the limit for evaporated gases is two grams of HC per hour, which is about one liter per month. At first, the idle test, which was a two-speed test was conducted in the 1980s. Then it was substituted by the dynamometer test in the late 90's, in the accelerated simulated mode or ASM three gases are tested. Various states and countries have developed unique laws about pollution testing of vehicles.

    Good luck, and remember rated this help.

    Mar 16, 2010 | 2003 Chevrolet S-10

    1 Answer

    P1457 code manufacturer control

    on the V-6 or the 4 cylinder models, this would mean that your o2 sensor heater circuit, if you had this replaced the last time, I would check the connections, they may be loose, Good Luck!

    Sep 23, 2009 | 2000 Honda Accord

    1 Answer

    What those code p1441 manufacturer control auxiliary emission controls mean

    what you want to do is take it to nissan and scan it with the consult2 diagnostic system to tell you which of the many things in the system have failed.
    the EGR is the most common.

    May 28, 2009 | 2001 Nissan Xterra

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