Q: clear/replace EGR valve

asked by on June 06, 2017

I have a 2001 Honda Accord LX 4 cylinder. The engine light is on and the code is P1491. It seems the problem is the EGR valve. What tools are needed to clear/replace the EGR valve? (e.g. What types of wrench and rockets?)

Exhaust Gas Recirculation/EGR Valve Replacement $160.41 - $965.47 Get a Quote

Hello, thank you for writing in. For exact specifications on tools needed and a step by step procedure, you will need to access a service manual for the vehicle. Typically you would expect to use a 12 mm socket or similar size. You will start by removing the EGR valve from the system. You will then want to clean the valve itself and the port in which it connects to. The carbon deposits are often difficult to clean and a chemical cleaner of some sort to help. Carburetor cleaner is a standard go-to for this kind of job. Make sure the electrical connections are clean, dry, and tight as well. For more help with this or replacing the valve, contact our service department to schedule an appointment.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Issue with throttle position sensor and Check Engine light is on.
I'm not quite sure what to make of this description, but I'm guessing you are trying to say the check engine light goes off and on intermittently with a code stored for the throttle position sensor (TPS). I do not...
Gear selector stuck in park
Hello. This is a common problem in both Chevrolet and GMC trucks and SUVs of that year. The safety system requires pushing on the brake to start the vehicle, so the problem is likely that the brake switch on the...
Transmission axle sea
You didn't mention that you had the axle replaced but if you did the new axle may be the wrong one for your car, or you may have to get the replacement axle and seal from the dealer. This vehicle...
It stalls while driving, fuel pump has been replaced, checked fuel module...still stalls in middle of road
There are a huge amount of possible causes for your stalling problem (https://www.yourmechanic.com/services/car-is-stalling-inspection). They include other fuel related components, ignition (spark) components, electrical components, or air intake components. Do you know for a fact your technician scanned the computer for...
Car jerks at a steady speed.
This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected...
Abs light, emergency brake light, steering wheel assist light, engine light, EPC light, traction control light
Hello, thank you for writing in. The vehicle does utilize a lot of the same sensors for these systems. Are there any other codes that are coming up when this code appears? If so you will want to take these...
Transmission lost all fluid I refilled it and now you step on gas and car wont go. 2003 Saturn Vue
Hello - if the vehicle was driven any distance with low fluid, major damage could have occurred. If the transmission now has a proper, clean fluid level, and won't move in any gear, there is likely serious damage. I would...
i have a knocking noise coming from under my feet on driver side by the tire and its a bottom knock right under the gas and brakes
Hi there. If your vehicle is a front wheel drive, then the noise could be a CV Shaft failing causing the knocking noise. If your vehicle is a 4x4, then the front driveshaft universal joints are worn and making the...
I had to put in a new clutch on my 1994 trooper and after a lot of problems I have finally gotten it all together again but it won
It sounds like you did not put the clutch linkage back in place correctly. Without seeing the vehicle it would be hard to know what is causing the problem . I suggest having a mechanic like one from YourMechanic inspect...

Related articles

Symptoms of a Bad or Failing EGR Vacuum Modulator
Common signs include engine performance issues, the Check Engine Light coming on, and failing an emissions test.
Symptoms of a Bad or Failing Idle Control Valve
Common signs include irregular or unusually high idle speed, the Check Engine Light coming on, and stalling while idling.
How to Replace an Exhaust Gas Recirculation (EGR) Tube
The EGR valve is connected to an EGR pipe, which helps distribute molecules through your vehicle’s EGR system. A bad pipe leads to performance issues.