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02regal. Very low power po404code - Cars & Trucks

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DIAGNOSTIC TROUBLE CODE P0404 ELECTRIC EXHAUST GAS RECIRCULATION OPENED Features of the Circuit

  • By any chance if high combustion temperatures are created by oxides of nitrogen then an Exhaust Gas Re-circulation EGR system which is the chief feature of this system will be boosted to counter this.
  • This is done by supplying small amounts of exhaust gases back into the combustion chamber.
  • Combustion temperatures are minimized as soon as the air/ fuel mixture dilutes the exhaust gases.
  • The EGR valve has been specially designed to generate exhaust gases to the engine without using intake manifold vacuum.
  • This valve regulates exhaust flow entering the intake manifold from the exhaust manifold through an orifice with an ECM controlled pintle.
  • The pintle position is monitored by the ECM using inputs from the Throttle Position (TP) and the Manifold Absolute Pressure (MAP) sensor.
  • This task over, the ECM then directs the EGR valve to operate as necessary by controlling an ignition signal through the ECM.
  • The ECM further monitors the results of its command through a feedback signal.
  • The desired EGR position can be checked with the help of a scan tool.
  • A voltage signal representing the EGR valve pintle position is sent to the ECM by a 5 volt reference and a ground to the EGR valve.
  • The scan tool can also be used here to note the feedback signal which is the actual position of the EGR pintle.
  • The correct EGR position should always be close to the commanded or Desired EGR position.
  • This Diagnostic Trouble Code (DTC) is capable of identifying an open or short circuit.

Posted on May 13, 2014

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Posted on Jan 02, 2017

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The vehicle is equipped with power windows controlled by the door modules. The DDM receives a window switch request, over the SBI serial data, from either the passenger door module wired to the window switch pressed or from the driver door switch assembly. The DDM checks the Class 2 serial data to see if the status information is correct (i.e. ignition switch position) to permit window operation.
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The windows are powered by discreet power and ground circuits. These circuits are in the same dedicated connector as the window motor drive circuits.
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1 Answer

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1 Answer

2006 RAM1500 left headlight won't work, new bulb, new pigtail and still no power to the low beam wire. Tried testing the headlight switch, but can only find 12v in, must be low voltage output. Am I...


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1 Answer

Can low steering fluid cause mechanical problems


Problems associated with low power steering fluid…

Hard Vehicle Steering
A low power steering fluid level can often times cause a vehicle's steering to become hard and labored. Adequate amounts of power steering fluid are necessary to enable a vehicle's power steering system to function and operate at optimum levels. A lack of power steering fluid in a vehicle's power steering system reduces the amount of hydraulic fluid pressure necessary to efficiently operating the various parts of the entire power steering system. Power steering fluid supplies the fluid force needed to operate the power steering gears and to enable power steering gearbox operation. Low power steering fluid levels reduce this hydraulic pressure, which commonly results in hard vehicle steering.

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It is very common for a low power steering fluid level to cause significant power steering pump noise. An adequate amount of power steering fluid is required to ensure the proper function and longevity of a power steering pump unit, which is a belt-driven pump responsible for housing and circulating power steering pump fluid. A low level of power steering fluid results in increased power steering pump friction, heat, and wear, all of which can significantly reduce the operational life of the power steering pump while at the same time cause excessive power steering pump noise.

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Many times a low power steering fluid level can result in excessive heating of power steering fluid, a condition that can seriously degrade the fluid and cause it to boil. A low power steering fluid level results in less available fluid to both lubricate and cool a power steering pump unit. A lack of power steering pump lubrication and cooling leads to excessive heat being generated within the power steering pump unit itself, a condition that translates into the available level of power steering fluid becoming super-heated and degraded. When this happens it is common for the power steering fluid to boil and lose all of its lubricating and heat-reducing capabilities.

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1 Answer

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1 Answer

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