Question about 1997 Acura CL

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Can the EGR valve on a 1997 Acura CL 2.2 be cleaned?

Can an EGR valve be cleaned or repaired?

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  • Anonymous Mar 14, 2014

    how to clean egr valve

  • Anonymous Mar 15, 2014

    coding p1404

  • Anonymous Mar 15, 2014

    replaced the egr valve and it's coding P1404. What do I do?

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  • 140 Answers

Sometimes you can remove them and clean the carbon build up off of them and lubricate it before you reinstall it. Make sure you can find a new gasket before you take it off. Usually you ruin the gasket removing the EGR. Good luck. Please rate me so I know how I'm doing. Thanks.

Posted on Dec 30, 2008

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Posted on Jan 02, 2017

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Are the test something I can do on P0488 EGR valve .


the 2.0L engine, in uSA? (6 engine world wide even k11/12)

egr tests and steps, and cleaning or extensive
the valve must not stick
the total path not blocked. end to end.

488s may mean just that.
it's a 5 wire motor driven EGR valve
clean it first
some will reset and cycle key on, off.
use that trick to clean it, and see if it works.


many newer cars the EGR has a read back device, direct. it has variable resistor in the main valve, that tells the PCM that the valve moved to the correct spot.
if this fails, the valve is stuck.
reading up on 488s, tells you what the test does.
i dont have that book,
if the motor works and is not stuck then the path is blocked,

the exhaust path, this can be a small horror to cure.
once you do one, then 2nd will not be fun.
after you look like a carbon covered monkey.
Some take a full weekend to do at home.
see these 5 pins on back of main egr.
there is a motor there, but one pin might be
egr feed back sensor. not sure.
, one way to test it. is to unscrew it.
and clean it then cycle the key connected
and look inside to see if it moves inside.
the ECU resets it and at key on, you can watch it.
if it seems to work ok,, the path is blocked, sorry

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Apr 28, 2016 | 2004 Suzuki Forenza

1 Answer

What is code 0401 insufficient flow to EGR valve


A code P0401 likely means one ormore of the following has happened:
  • The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
  • There is a blockage in the EGR (tube), most likely carbon buildup
  • The EGR valve is faulty
  • The EGR valve may not be opening due to a lack of vacuum
PossibleSolutionsTo fix this code, it is quite commonfor people to just replace the EGR valve only to have the OBD code return. TheEGR valve is not always the culprit.
  • Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticeable difference in RPM's with the EGR open
  • Clean out the EGR valve and/or tubing to remove deposits
  • Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
  • Replace the DPFE sensor (with a good quality / OEM one)
  • Replace the EGR valve

Mar 07, 2012 | 1994 Ford Taurus

1 Answer

Code 1404 on 01 malibu


The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation (EGR) valve pintle position input to ensure that the valve responds properly to commands from the PCM. When the ignition switch is turned ON, the PCM learns the EGR learned minimum position. The PCM compares the EGR learned minimum position to the EGR position sensor when the EGR valve is commanded closed. If the EGR position sensor indicates that the EGR valve is still open when the PCM is commanding the EGR valve closed, this DTC will set.

A scan tool that is capable of commanding the EGR circuits on and off is required to verify EGR performance and sensor feedback voltages at the PCM. However, this code is USUALLY caused by carbon getting stuck in the EGR pintle and holding it open. A good cleaning is usually all that is required to fix this.

You will need an EGR gasket. Remove the EGR valve and inspect the ports for heavy carbon deposits. These deposits can usually be cleaned out using screwdrivers and a piece of mechanics wire to break the carbon loose and some carb and choke cleaner to finish the clean-up. A wire brush and some carb cleaner usually works for the EGR valve itself. Once the ports and the valve are clean, re-install the valve using the new gasket. Clear the codes and drive the vehicle to see if the problem is fixed. Please note that the EGR monitor runs at speeds over 50 Mph. during deceleration, so you need to get the vehicle on the highway for a valid test of the EGR system.

If the Check Engine light does not come on during the road test, Connect a code reader and check the OBD readiness monitors. If the EGR monitor says "complete" and there are no codes in the computer, then you have done a successful repair.

Aug 04, 2011 | Chevrolet Malibu Cars & Trucks

1 Answer

Sevice engine soon light comes on due to egr valve on my 1995 Chevy S-10


egr valves start to clog with carbon on the valve and cause -loss of power -hesitation-stalling -hard start -problems u may get lucky by unbolting it and cleaning the egr valve with a carb cleaner and checking the valve seat that it working when u remove it also check the spring [not broken or filled with carbon ]if the unit is unable to be cleaned or repaired replace an egr problem can leave u stuck

Jun 27, 2011 | 1995 Chevrolet S-10 CA Edition

2 Answers

I have a code P0401. What is this and how can I fix it?


P0401 - Exhaust Gas Recirculation Flow Insufficient Detected

Possible causes - 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 passage clogged
- Exhaust gas leaks Possible solution - Clean EGR Valve
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve

Mar 20, 2011 | 1998 Ford Taurus

1 Answer

Ford Explorer : How to Troubleshoot the EGR P0401 Trouble Code


P0401 - Exhaust Gas Recirculation Flow Insufficient Detected

Possible Causes:
- 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 passage clogged
- Exhaust gas leaks
- Faulty EGR valve

Possible Solutions:
- Clean EGR Valve
- Replace EGR Valve
- Repair EGR harness or connector
- Replace EGR volume control solenoid valve
- Replace EGR volume control valve

Jan 24, 2011 | Ford Explorer Cars & Trucks

1 Answer

How to clean/check the egr valve


When the EGR VALVE is clogged or malfunctioning, it can cause irregularities in engine performance such as rough idling or valve knock, indicating that the EGR valve should be inspected.
The EGR valve works by routing a small amount of exhaust back into the combustion chamber. When the temperature in the combustion chamber is too high, nitrogen oxides are produced, which combine with elements in the atmosphere to form smog. Introducing a small amount of exhaust into the system reduces the temperature in the combustion chamber, reducing the amount of nitrogen oxides produced.

Many EGR valves are mechanical, and simply have a small valve which opens to allow exhaust into the combustion chamber and closes when it is not necessary, and to keep the air mixture optimal for combustion. Some mechanical versions will not open until there is sufficient back pressure, ensuring that the valve will not be open when the engine is idle or warming up and needs a higher concentration of oxigen for combustion. Electronic EGR valves are also available, and use electronics to regulate the valve.

If the EGR valve is stuck open, it will essentially cause a vacuum leak, leading to inefficient combustion, rough idling, hesitation, and sometimes stalling in extreme cases. This is because the car cannot combust on carbon dioxide from the tailpipe — it needs atmospheric oxygen. If the combustion chamber is flooded with exhaust from an open EGR valve, it will not function properly. To check and see if the EGR valve is stuck open, have someone idle a parked vehicle with the brake on while you examine the plunger shaft to see if it is stuck open.
If the EGR valve is stuck closed, emissions of nitrogen oxides will rise, and the car may start to knock. Spark knock happens when the fuel mixture in the combustion chamber ignites before it has been reached by the explosion in the cylinder, resulting in a disruption of the engine timing. In this instance, the engine should be warmed up and revved to see if the EGR valve will move.

In both cases, simple repairs are possible. The EGR valve can be clogged, and a simple cleaning of a mechanical EGR valve may solve the problem. In the case of an electrically controlled EGR valve or a more complex mechanical problem, replacement of the valve may be needed. The EGR valve is an expensive motor vehicle component, and care should be taken to ensure that it needs to be replaced rather than repaired. A reputable mechanic should advise you appropriately.

Failure to repair or replace the EGR valve will not lead to a life threatening condition, although it will reduce the life of your car and increase the potential emissions. Especially in areas which require smog testing, an automobile with a malfunctioning EGR valve may not pass

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Mar 18, 2010 | 2007 Mitsubishi Galant SE Sedan

1 Answer

P0401 egr flow all senors,ports working properly at shop with ase


check ur egr valve -there are 3 parts to the egr --the dpfe[differential pressure feedback egr ]sensor//egr valve//actuator solenoid--++biggest problem with the egr valve is that it gets carboned up and the valve is stuck remove and clean the valve and tube with a carb cleaner and check valve for movement if faulty replace also check vacuum line and vacuum to egr unit

Feb 14, 2010 | 2001 Mitsubishi Eclipse

1 Answer

How do you repair codes PO141 and PO136 2000 Ford E-350 with a 5.4 engine


Causes A code P0401 most likely means one or more of the following has happened:
  • The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced, this is the common cause
  • There is a blockage in the EGR (tube), most likely carbon buildup
  • The EGR valve is faulty
  • The EGR valve may not be opening due to a lack of vaccuum
Possible Solutions In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
  • Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
  • Clean out the EGR valve and/or tubing to remove deposits
  • Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
  • Replace the DPFE sensor (with a good quality / OEM one)
  • Replace the EGR valve

Symptoms There may be no visible symptoms to the driver. Poor fuel mileage, possible misfire, depending on O2 sensor position when sticking.
Causes A code P0136 may mean that one or more of the following has happened:
  • Faulty O2 sensor leak in exhaust close to O2 sensor, faulty O2 sensor is the common cause.
  • Short to voltage on O2 signal circuit
  • Open in circuit resistance caused by corrosion in connector
Possible Solutions
  • Replace the second oxygen sensor on bank 1
  • Repair open or short in signal circuit
  • Clean corrosion from connector

Sep 16, 2009 | 2007 Ford E-350 Super Duty Length XLT

1 Answer

How do you replace egr valve in a 2005 dodge caravan


REMOVAL - 2.4L The EGR valve and Electrical EGR Transducer are serviced as an assembly.
  1. Disconnect vacuum tube from electric EGR transducer. Inspect vacuum tube for damage.
  2. Remove electrical connector from solenoid.
  3. Remove EGR tube bolts from EGR valve.
  4. Remove EGR valve from cylinder head adaptor.
  5. Clean gasket surface and discard old gasket. Check for any signs of leakage or cracked surfaces. Repair or replace as necessary

INSTALLATION - 2.4L The EGR valve and Electrical EGR Transducer are serviced as an assembly.
  1. Assemble EGR valve with new gasket onto the cylinder head adaptor.
  2. Loose assemble the bolts from EGR valve to EGR tube.
  3. Loose assemble the bolts from EGR valve to cylinder head.
  4. Tighten bolts from EGR valve to cylinder head to 22.8 N·m (200 ±25 in. lbs.) torque.
  5. Tighten bolts from EGR valve to EGR tube to 11.9 N·m (105 ±20 in. lbs.) torque.
  6. Reconnect vacuum hose and electrical connector to electrical EGR transducer.

Aug 03, 2008 | 2007 Dodge Caravan SXT Minivan New Cars

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