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Wats a ecm modual and 02-sensor and a egr valve and how much are they.

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  • Cars & Trucks Master
  • 5,252 Answers

The ecm is the engine computer, or the main computer if the car has more than one computer equipped on it.
The oxygen sensor is one of at least a dozen sensors the ecm gets information from, so it can run the engine at optimum performance. The oxygen sensor is placed in the exhaust stream, and most cars of these days have more than one, some as many as four.
The egr valve is an emission control valve, pretty simple-it's been around for a long time, it works to keep air pollution down. Problem is, now days the valve operation has some electronic controls that defy an untrained person how to make it work. You will find when you take it off, if it has the common problem of being clogged up with carbon deposits-both the bottom of the egr valve and the passages beneath-it is exhaust gas carbon deposits, can be cleaned and hopefully made to work right again.
Just a guess as to cost, the engine module will be the biggest expense, $400 bucks, lowball, and no gaurantee it will solve everything.

Posted on Jan 20, 2013

  • Marco pantoja Jan 23, 2013

    Thanks will look in to that

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: EGR Valve, O2 Sensor

Absolutely a bad o2 sensor can cause problems with performance. If you replace one it is highly recommended to replace both or all four depending on your vehicle. If one o2 sensor is making your vehicle run rich you will burn more fuel and in return increase the amount of carbon or unburnt fuel if you will in your egr valve you could probably get away with cleaning it but I would recommend replacing it, it will save you from having to pull it off again. Check your catyletic converter because long exposure to carbon will mess it up.

Posted on Jun 06, 2009

bibleman01
  • 334 Answers

SOURCE: 02 monte carlo, radom misfires, EGR circuit failure

Does it misfire under load like when you press on the gas peddle after slowing down then accelerate or at idle. When you say spark plug did you mean all the spark plugs?

Posted on Nov 24, 2008

emissionwiz
  • 75051 Answers

SOURCE: 1992 Honda Accord will not pass emissions inspection

The EGR will not cause this issue, this sounds like the Catalytic Converter was not hot enough, another trick that worked for this kind of fail was a fresh oil change, make sure the engine is up to normal operating temp, which would be just short of 1/2 scale on the temp guage, if it runs cold replace the thermostat, I did smog tests for 30 years and these are the things I did to get cars like yours to pass given the test results you gave for the tailpipe.

Posted on Dec 05, 2008

  • 14 Answers

SOURCE: 2002 Crown Victoria check engine light stays on

Are you talking about insufficient egr flow? Possibly code p0401. it is probably your dpfe sensor .

Posted on Jul 08, 2009

  • 61 Answers

SOURCE: I changed EGR valves, selinoid, sensors, and even

go to auto zone or someone with a scan tool to find out what codes are stored on the computer in the car

Posted on Jul 30, 2009

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Check engine light on, scan code p0175. I already change MAF and check O2 sensors. have you any advice?


code p 0175 refers to system too rich bank 2===causes --intake blocked ---EVAP canister purge valve ---fuel pressure ---EGR system---injector/s ---HO2S
basically you changed the wrong sensor as the HO2S sensor is the sensor in the exhaust manifold or before the cat converter
It tells the ECM to adjust the injector flow for that bank to a leaner mixture (O2 sensors are after the cat and tell the ECM if the mixture is right for complete burn
it could be from a bad injector that is leaking at the tip and the ECM cannot control the fuel mix

Jan 21, 2016 | 2006 Hyundai Tucson 4WD 2.7L V6

1 Answer

OBD-11 codes 0403 & 0405


code p0403 refers to EGR --circuit malfunction===causes ---wiring--EGR solenoid---ECM
code p0405 refers to EGR valve position sensor A --low input===causes ---wiring ---short to ground---EGRF valve position sensor--- ECM.
By only changing the EGR valve you have not fixed the problems that cause the valve not to work.

Dec 22, 2013 | 2001 Chevrolet Lumina

1 Answer

What does obd2 code p0406


The code P0406 is for Exhaust Gas Recirculation Sensor 'A' Circuit High. The possible causes are EGR Valve clogged, dirty or leaky, EGR valve damaged/defective, EGR sensor ground circuit open, EGR sensor signal circuit open, EGR volume control solenoid valve harness is open or shorted, EGR volume control solenoid valve circuit poor electrical connection. An improper voltage signal is sent to ECM through the valve. You will have the symptoms of engine light on and engine hesitation.

Jul 02, 2013 | Cars & Trucks

1 Answer

P 1401 location


Codes don't have a certain location, a code means a problem has occurred in a system of the electronics of the cars fuel control or emission control system.
P1401 NISSAN - EGR Temperature SensorPossible causes- EGR Temperature Sensor harness is open or shorted
- EGR Temperature Sensor circuit poor electrical connection
- Faulty EGR Temperature Sensor
- Malfunction of EGR function, EGRC-BPT valve or EGRC-solenoid valve
- Blocked EGR passages When is the code detected?An excessively low voltage from the Exhaust Gas Recirculation (EGR) temperature sensor is sent to Engine Control Module (ECM) even when engine coolant temperature is low, or an excessively high voltage from the EGR temperature sensor is sent to ECM even when engine coolant temperature is high.
P1401 NISSAN Description The Exhaust Gas Recirculation (EGR) temperature sensor detects temperature changes in the EGR passage way. When the EGR valve opens, hot exhaust gases flow, and the temperature in the passage way changes. The EGR temperature sensor is a thermistor that modifies a voltage signal sent from the Engine Control Module (ECM). This modified signal then returns to the ECM as an input signal. As the temperature increases, EGR temperature sensor resistance decreases.
This sensor is not used to control the engine system. It is used only for the on board diagnosis

Oct 08, 2012 | 2000 Nissan Maxima

1 Answer

What does the check engine code p0406 mean on my dodge caravan with a 3.3L engine?


P0406 - Exhaust Gas Recirculation Sensor A Circuit High
An improper voltage signal is sent to ECM through the valve

Early Models : The EGR valve control the amount of exhaust gas routed to the intake manifold. Vacuum is applied to the EGR valve in response to the throttle opening. The vacuum control the movement of the taper valve connected to the vacuum diaphragm in the EGR valve.

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Late Models : The EGR volume control valve uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECM. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECM does not issue the pulse signal. A certain voltage signal is issued so that the valve remains at that particular opening.

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Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hesitation

Possible causes
- Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control solenoid valve
- EGR temperature sensor and circuit

Possible solution
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve


Hope helps (remember to rate and comment this answer).

Mar 31, 2011 | Dodge Caravan Cars & Trucks

2 Answers

2005 Pacifica check engine light spit out this code P 0406


This is an EGR code and it is generally caused by the EGR passages being carboned up and not allowing proper flow to the valve. I would remove the EGR valve and inspect the passages and clean them if necessary before I went any further.

Jun 14, 2010 | 2005 Chrysler Pacifica

1 Answer

What is the 1987 pontiac fiero gt v6 check engine light code list?


CODE 12- NO DISTRIBUTOR REFERENCE PULSES ECM. CODE 13- OXYGEN CIRCUIT. CODE 14- COOLANT SENSOR HIGH TEMP CODE 15- COOLANT SENSOR LOW TEMP. CODE 21 - THROTTLE POSITION SENSOR VOLTAGE HIGH.CODE 22 - THROTTLE POSITION SENSOR VOLTAGE LOW.CODE - 23 MIXTURE CONTROL SOLENOID.FOR CARBURETOR ENGINE. CODE 24 -VECHICLE SPEED SENSOR. CODE 32 - BARO CIRCUIT LOW.CODE 32 - FUEL INJECTED EGR VALVE VACUUM SWITCH SHORTED TO GROUND.OR EGR VALVE SOLENOID CIRCUIT OPEN. CODE 33 - MAP SENSOR.CODE 34 - VACUUM SENSOR OR MAP SENSOR.CODE 35 - IDLE SPEED CONTROL. CODE 41 - EST CIRCUIT. CODE 42 - ELECTRONIC SPARK TIMING.CODE 43 - ELECTRONIC SPARK CONTROL UNIT. CODE 44 - LEAN EXHAUST.CODE 45 - RICH EXHAUST. CODE 51 - PROM OR MEM CAL.CODE 52 - CALPAK. CODE 53 -EGR VALVE CARBURETED ENGINE THE EGR VALVE VACUUM SENSOR HAS RECEIVED IMPROPER EGR VACUUM. CODE 54 - M C SOLENOID CARBURETED ENGINE MIXTURE CONTROL SOLENOID SHORTED OR FAULTY ECM.CODE 54- FUEL INJECTED ENGINE FUEL PUMP VOLTAGE IS LOW.CODE 55 - ECM MAKE SURE PCM GROUND CONNECTIONS ARE TIGHT.IF OKAY.REPLACE THE ECM.

Mar 27, 2010 | 1987 Pontiac Fiero

1 Answer

'04 Nissan Altima 02 sensor, cam sensor & air to fuel sensor all


CHECK FUSE TO EGR VALVE CIRCUIT.AND CHECK ECCS RELAY.IF ALL IS GOOD YOU HAVE FAULTY PCM OR ECM CONTROL MODULE.

Jan 07, 2010 | 2005 Nissan Altima

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