Q: EGR valve and vacuum
The Check Engine Light is on. According to Advanced Auto, it shows that the EGR valve and EGR vacuum modulator may need replacement or to be cleaned.
If you got code P0401 for the EGR system malfunction, then the system would need to be tested to see whether or not the vacuum modulator valve is holding vacuum and can control the EGR valve. These tests are needed to see if the valve and modulator are good or not; the EGR tube could be in need of cleaning. If all this is done then a proper diagnosis can be given. I recommend having a mechanic, such as one from YourMechanic, run a diagnostic to see if your EGR vacuum modulator requires replacement, or if another path of repair will be necessary.
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
What others are asking
Gear stick stuck
Hi, there are a few different possibilities for why your gear stick is stuck. A couple reasons are a worn-out ignition or a broken shifter mechanism. I would recommend getting a qualified mechanic from YourMechanic to come out and inspect...
I have rusted rocker panels on both sides of the car is it worth saving?
Hi there, thanks for writing in. Body shop prices vary widely, mostly based on where you are, and how good the body shop is. If both your rocker panels are truly rusted out, it will probably far exceed the value...
Fluid in the boot looks like power steering fluid
Hello. The fluid in the boot is a separate issue. If there is fluid in the boot it is because the rack and pinion is failing. These boots are not there to contain fluid but to keep dirt out. If...
Trac light and VSC warnings sound for no reason, can I disable them
Hello. Unfortunately you cannot disable this without having other issues. Most of the time this is caused by a calibration issue with the yaw sensor and the steering wheel. I usually reset and calibrate the system to see if that...
Check engine light
Without additional detail as to the symptoms of the car and how it is running, this may be difficult to diagnose. The coolant temperature sensor is generally something that when not working properly, will cause the car to run hot....
Lights flickering when the throttle is pressed and the turn signal is on.
The issue seems to be with the multi-function switch for the turn signals. The switch is shorting out inside it on the high beam selector which is effecting all of the lights. I recommend replacing the multi-function switch. If you...
05 Acura tl 6 spd will not accelerate
First see if engine will rev up out of gear to see f problem is engine throttle or you have a slipping transmission clutch. If engine runs good and revs normally then have the transmission clutch checked for needing replacement....
My car is making a weird rattling noise
If the noise occurs at idle, typical causes are the accessory (belt driven) components, the torque converter or an engine component. As you describe the rattling, it is marked enough that a mechanic would likely pinpoint it quickly on inspection....
Can the positive cable be split with a dual post battery on a 1996 Sierra
Yes you can split them and put them on different posts as long as they both get battery power they will work.
Related articles
P0003 OBD-II Trouble Code: Fuel Volume Regulator Control Circuit Low
P0003 P0003 trouble code definition The P0003 code is associated with the electrical circuit which connects to your fuel pressure regulator. It also may be related to other codes, such as: P0001, P0002, or P0004. What the P0003 code means...
How to Start a Prius
The The Toyota Prius was a game changer when it was first introduced back in 2000. As one of the first commercially successful hybrid vehicles, it eventually helped launch an entire hybrid industry. The hybrid engine was not the only...
C1101 OBD-II Trouble Code: ABS Hydraulic Valve Circuit Failure
Trouble code C1101 means the engine control unit (ECU) has detected an unspecified failure in the ABS hydraulic valve circuit.
Browse other content
Maintenance
Cities