Q: I have changed the MAF sensor, oxygen sensors, gas cap, catalytic converter and I still get check engine light.

asked by on May 23, 2017

I have changed the catalytic converter, oxygen sensors, MAF sensor and gas cap trying to remedy my check engine light problem. It comes on and goes off intermittently, and there is a noticeable change in the power of the car when it happens. A boost when it goes off and a sluggish feeling when it comes back on. Haven't found a vacuum leak anywhere. Any ideas as to my next point of inspection? Thanks

My car has 135000 miles.
My car has a manual transmission.

Hello, thank you for writing in. With a check engine light on, the first step is to have the vehicle scanned for diagnostic codes. This can be done by a technician, or at most auptmot8ve parts stores. That information will guide you to the system or component having issues. Your symptoms may be caused by an EGR problem, fuel system problem, or a variety of other issues. Ignition system malfunctions can also cause similar symptoms. Only further inspection will tell. For more help with testing contact our service department to schedule an appointment.

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

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

I'm trying to purchase an "EcoPlug" for my stripped out drain plug. How do you determine if your oil pan is aluminum or steel?

VW may be making the replacement oil pans from aluminum for weight and/or cost savings . If the magnet is sticking to your oil pan, then it is steel as a magnet will not stick to aluminum. Hope this helps....

I have problem ( Engine power Reduced ), Code 1682 ignition 1 switch circuit 2

The P1682 code means that there is a difference in voltage between the ignition switch circuit 1 and circuit 2. There are a few things that can cause this - including a fault with the ignition switch itself or a...

No brake lights working and won't shift out of park.

Hello there, you have a few different things going on with your Ford E-350. You did not state if the vehicle will start or not with these problems. If the vehicle will not start and it has these faults the...

Related articles

P0568 OBD-II Trouble Code: Cruise Control Set Signal Malfunction
P0568 P0568 code definition Cruise Control Set Signal Malfunction What the P0568 code means P0568 is an OBD-II generic code that the engine control module (ECM) or body control module (BCM) identified a voltage signal for more than 90 seconds...
P0674 OBD-II Trouble Code: Cylinder 4 Glow Plug Circuit
P0674 code means when the voltage from the glow plug circuit has a variance of 10 % over manufacturer specs due to a faulty plug, relay, or wiring.
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed Related Trouble Codes: P2441:...