Q: Car reluctant to accelerate as if not getting power

asked by on

Recently I started having an issue with my car when I try to accelerate it seems reluctant to do that. The check engine light came on and the code read Po404 and also there was something about misfires. I got the EGR valve replaced but it didn't solve the problem. One thing I have noticed is that the problem goes away after driving the car for about 15 minutes.

Thank you in advance for any advice.

My car has 143000 miles.
My car has an automatic transmission.

Hi, thanks for writing in. Let me start by explaining one of the strong possibilities concerning the misfiring. When the EGR valve malfunctions, the engine cylinders can combust prematurely. The computer will then detect the issue and label it as a misfire. Another issue you may want to check would be the passages around the EGR valve. There can be a deposit of carbon in the valve that can cause the valve to malfunction. If these were not cleaned thoroughly when the EGR valve was replaced, then the problem would still exist. Considering the fact you just got the repair done, you may want to trace over their work and verify the repair is still holding. A wiring issue would also cause this code to set, and cause issues with the valve in the first place. Here at YourMechanic, we can have a technician come to your home or office to inspect and diagnose this issue for you, and make or suggest the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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. Car reluctant to accelerate as if not getting power

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: Jeep hesitating and then taking off

From the information provided on your Jeep Liberty, it leads me to believe that the problem may actually lie with the transmission and not with the fuel filter. After shifting into gear, if there is a delay in the engagement...

Q: lost control of one wheel. on the left. seems broken

It sounds like you had a tie rod ball joint break or another ball joint break. You will have to have the vehicle towed to a shop for inspection, or to a safe area where a mobile mechanic can inspect...

Q: My car has idling problems that come and go

The biggest problem with inconsistent engine idle issues is trying to diagnose them. However, there are a few other components you haven't listed that might be faulty. The first is the throttle position sensor. It's likely your Mitsubishi has an...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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.