Q: Loss of power going uphill and acceleration issues on flat land

asked by on

I noticed a month and a half ago that my vehicle has been having performance issues while trying to go uphill. I checked with several mechanics about what could cause it and I've done everything that they have told me to do, from changing spark and wires to changing the radiator and cooling fans to even replacing transmission fluid and filter. When I went to AutoZone, I had them run a diagnostic computer test on the van and got 14 cides, most of which were minor, but the two big ones were for an oxygen sensor and the EGR valve (code P0401) so I ordered the EGR valve, which the guy who works there said would solve this problem. I've spent several hundred dollars and lots of hours working on this and need my vehicle at peak performance again. I just don't want to spend money and install parts that don't need to be replaced if I can help it. So, will changing the EGR valve solve my problem?

My car has 300751 miles.
My car has an automatic transmission.

Hello. P0401 is the trouble code for insufficient EGR flow. This can occur for a few different reasons, and could be contributing to your performance issues. The EGR, short for exhaust gas re circulation, is a system designed to recirculate exhaust gasses back into the the engine in order to reduce N0x type emissions. Insufficient flow can be caused by a faulty EGR valve, however usually a faulty EGR valve will produce it’s own trouble code. Insufficient flow can also be caused by an obstruction or leak in the EGR system piping, which is not an uncommon occurrence. 14 trouble codes indicate that there is likely several issues present with the vehicle. I would recommend having a professional technician, such as one from YourMechanic, come to your location to determine if the EGR valve needs to be replaced, and what other repairs may be needed.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Loss of power going uphill and acceleration issues on flat land

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

Get a quote

What others are asking

Q: Need instructions to set timing on windshield wipers

The process can be very difficult and there is some steps that require turning on the wiper to intermittent and then measuring the alignment. You can search up "wiper transmission installation" for your specific vehicle and it should come up...

Q: Why is my dashboard cracked in so many places?

Hi! Thank you for writing in with this question. This is a common issue for multiple Toyota vehicles of that vintage. Toyota released a Technical Service Bulletin (TSB 0039-15) for this concern in June 2015. The specific coverage is based...

Q: Fixed car after Service Engine Soon light came on. It's still not working right

I can understand how frustrating it can be to replace parts on your car only to have it continue to experience problems. There can be several reasons why your Pontiac has its’ Service Engine Soon Light illuminated. If there is...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.