Question about 1993 Dodge Intrepid

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Egr valve were is it located on the motor car failed emission twice mechanic said change it be okay that oroxygen sensors

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  • Anonymous May 11, 2010

    please clarify your question and be specific about what model engine size your vehicle is. also please tell me what the issue at hand is.

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Hello do you have engine service light on and if so was it scaned with OBD 2 scaner to retreve this fault "EGR" service eng light would be on if EGR is at fault! did you change your oil before E test and what is your milage on this car and do you know if you engine is a long "BLOCK" or short Block"

Posted on Dec 23, 2008

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HOW TO FIX THIS CODE p0446 code


The EGR (Evaporative Gas Recirculation) system has several components. The most likely one to cause an error is the EGR Position Sensor, located at the throttle body. If the EGR Sensor has become disconnected, has failed, or is sensing that the EGR valve has become stuck, it will generate an error. Check the EGR valve to be sure it isn't stuck, and check the EGR Position Sensor to be sure it is operating properly.

Also, in some cases, if the Canister Purge Valve has failed, it will generate an error. The Canister Purge Valve is usually located at one of the front fenders near the Carbon Canister.

Jul 19, 2014 | 1998 Toyota 4Runner

1 Answer

2001 buick century failed emission twice. we had a new catalytic converter put in, new egr valve,egr passage cleaned,new oil pressure sensor and new idle control valve. the check engine light goes off


Depends on where the failure occurs. Is the idle and low speed where it fails or the high rpm? Troubleshooting will be more exact if that is known

Jan 14, 2014 | Cars & Trucks

3 Answers

Failed mot due to excess emissions but why are there excess emissions?


have code read test doen for free at a auto parts store...it may be an O2 sensor or EGR valve...the code test should tell you

Jan 24, 2011 | 1995 Isuzu Trooper

3 Answers

A diagnostic report indicated a PO401 error?. The mechanic advised replacement of EGR bulb. Does it affect the performance of the engine if not changed?I live in mississauga ON Canada.


http://www.obd-codes.com/p0401

I don't know about the EGR bulb, but the EGR Valve should be replaced or the EGR Valve taken out, and the orifice it sits in cleaned out with carburetor cleaner in order to get the flow back up once a new or old EGR Valve is put back in.

Carbon builds up in the space, causing a lack of Exhaust Gas Recirculation to occur.

It should not affect performance, but might affect emissions due to exhaust gases not reducing combustion temperature and not reducing the NOx output of the engine.

If you have an emissions inspection program in your area required by law, it would fail the inspection if the code comes up. That's for the U.S. on a state by state, and region by region basis. I don't know about Canada's laws.



Jan 19, 2011 | Toyota Camry Cars & Trucks

1 Answer

I have no gears forward or reverse. My Vehicle is a 2003 Dodge Ram 1500 4x4 Hemi with 170,000 on the clock. Fluid is clean and full with no leaks. I have the following trouble codes:...


Your scanner will give you the code but it will not tell you how to fix your vehicle. Scanners basically tell you what systems to check or what systems are failing.

These are what your codes mean:

P0700: Transmission Control Module
- Shorted or open circuit within transmission control module (TCM)
- Failure of transaxle control module. This is just a informative code.

P0734: Gear ratio error in 4th gear
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0732: Gear ratio error in 2nd gear
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0731: Gear ratio error in 1st gear
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0871: Transmission Fluid Pressure Sensor Switch C

P0876: Transmission Fluid Pressure Sensor Switch D

Emissions Codes:

P0400: Exhaust Gas Recirculation Flow Malfunction
- Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control valve stuck closed
- EGR volume control solenoid valve
- Dead (Weak) battery
- EGR temperature sensor and circuit
- EGR Valve

How to fix :
- Clean EGR Valve
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve

P0440: EVAP Emission Control System Malfunction
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

How to fix:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

P0456: EVAP Control System Leak Detected (Very Small Leak)
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

How to fix:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

P0441: EVAP Emission Control System Incorrect Purge
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

How to fix:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

Based on the info check your EVAP system. I would check for leaks and maybe replace the EGR and the canister.

For the transmission check the TCM also you may need to take it to a mechanic though.

Hope this helps a little.

- Tech 101 (ASE CERTIFIED MASTER TECHNICIAN)
- Larson's Mobile Auto Repair
- 209-845-7620
- Oakdale, CA

Dec 31, 2010 | Dodge Pickup Cars & Trucks

1 Answer

I had two problems posted for my Ford Explorer 1998 P1400 Differential Press Feedback EGR Circuit low input Po455 Mod $10 3/4 EVAP EMISSION CONTROL SYSTEM LEAK (LARGE) How can I fix it and how can I go...


CODE PO455 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED.POSSIBLE CAUSE - CANISTER VENT SOLENOID STUCK OPEN OR.FUEL TANK PRESSURE SENSOR HAS FAILED MECHANICALLY.OR BAD FUEL CAP. CODE PO1400 -DIFFERENTIAL PRESSURE FEED BACK EGR SENSOR CIRCUIT LOW VOLTAGE DETECTED.POSSIBLE CAUSE -DPF EGR SIGNAL CIRCUIT SHORTED TO GROUND OR DPF EGR SIGNAL VREF CIRCUIT OPEN OR DPF EGR SENSOR IS DAMAGED OR HAS FAILED.I WOULD HAVE GARAGE OR DEALERSHIP TO USE THEIR DIAGNOSTIC EQUIPMENT TO CHECK OUT YOUR EMISSION CONTROL SYSTEM.AND EGR VALVE BECAUSE PARTS IS TOO EXPENSIVE TO BUY.IF YOU DONT NEED THEM.SEE YOU CAN REPLACE THE DPF EGR SENSOR AND THE CANISTER VENT SOLENOID.BUT IT COULD BE A LEAKING GAS CAP OR SOMETHING ELSE.SO LET GARAGE CHECK IT OUT.TO BE ON SAFE SIDE.NOW YOU CAN BUY THOSE 2 SENSORS AND IT COULD FIX YOUR RIDE.I KNOW MONEY IS TIGHT ECONOMY IS IN BAD SHAPE.

Aug 26, 2009 | Ford Explorer Cars & Trucks

1 Answer

Auto Diagnostic Trouble Code


cORRECT. tHIS CODE DOES DEALs With emmissions. P1400 deals with the EGR valve. In case u are not aware, EGR stands for Exhaust Gas Re-circulation. What really this valve does is that it re-cycles some of the exhaust gases into the cylinder for combustion. The EGR valve might be blocked or has malfunctioned. It is advised that this valve changed or consult with a mechanic who is knowledgeable about this technology. a malfunctioned/dis-abled EGR system will cause the car to fail an emissions test, and may cause the EGR passages in the cylinder head and intake manifold to become blocked with carbon deposits, necessitating extensive engine disassembly for cleaning. So it is advised that u repair this ASAP

Jan 19, 2009 | 1997 Nissan Maxima

1 Answer

1994 Buick Century [four cylinder engine]


You might have your computer checked to make sure the circuit that controls egr valve is working.  On my vehicle, I had several egr valves changed and failed the emissions test until I had the computer changed and the PROMS updated with the latest PROM.
The EGR valve is easy to change because it is on top of the engine.  It has electrical coils that control the valve and one of the valves may be damaged where it can not compensate at idle.  If the EGR is working, when the engine first starts the engine should increase in idle speed and then switch to a lower idle speed.  This is part of the EGR system check and it adjusts as the engine increases in temperature.
There are several other reasons if one of the Emission sensors is faulty that may cause the rough idle.  The oxygen sensor, tempearture sensor, MAP sensor,...etc.  You may have a trusted mechanic attempt to read any codes on the engine.

Aug 12, 2008 | 1994 Buick Century

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