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.

Check Engine Light is on Inspection $79.99 - $99.99 Get a Quote

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.

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

My truck feels like it won't go in drive while I'm driving

You should have the computer and transmission scanned to see if the system is storing codes that can be fixed without an internal transmission issue. The codes will need to have the pinpoint tests done to isolate the problem. ...

Clumping or bottoming out noise on hard bumps

Hi there. It definitely sounds like the bushings you mentioned could be the cause of the noise. However, worn shocks/struts can create a similar feeling or noise if they are worn out and not providing the dampening force necessary to...

I have a 2000 Toyota Corolla. I keep losing oil and it's not leaking on the ground. I changed the spark plugs and found oil on the

Hello, thank you for writing in. While there are several pathways for oil to get to the spark plugs, the most common is the valve cover gasket, and the o-rings located in the spark plug wells. One or both of...

CEL code P1101, Air intake system

Hi there. It may be time to find another repair facility. The P1101 code is the MAF (mass airflow) sensor is out of self-test range. This means the voltage parameters the PCM (powertrain control module)/computer expects to see for the...

Acura RDX 2010-check engine oil light

Hi there. The oil smoke seen, should have had a bluish tint and did not quickly dissipate. There are several possibilities for engine oil consumption. The most likely cause for your engine, is a failed oil seal in the turbocharger....

intermitant failure to "fire up"

I would suggest check to be sure the Mass Airflow (MAF) sensor is working properly. The symptoms you are describing are very common when this fails. As you may know, this regulates the flow of air into the engine allowing...

Noisy bearings in the water pump that has no leaks

The bearings inside of the water pump are sealed from the outside air by a rubber seal. They are also sealed from the inside water by a rubber seal. If they weren't, the water would get on the bearing and...

Engine revving when I pump the gas

There are a multiple list of components which can cause your issue. Your vehicle is particularly known to have throttle body issues and engine vacuum leaks. A diagnostic needs to be performed with special tools to correctly determine the issue....

Why Is My AC Blowing Warm Air?

There are quite a few reasons an A/C system will cease to provide you with cold air. Air conditioning systems are one of the more complex systems on a passenger vehicle. Without getting into to all the complexities and science...

Related articles

P0361 OBD-II Trouble Code: Ignition Coil K Primary / Secondary Circuit Malfunction
Trouble code P0361 means that a malfunction in an ignition coil, often due to an open or short in the driver circuit.
P2161 OBD-II Trouble Code: Vehicle Speed Sensor B Intermittent/Erratic
P2161 P2161 trouble code definition Vehicle Speed Sensor B Intermittent/Erratic What the P2161 code means P2161 is an OBD-II generic code for the engine control module (ECM) detecting the vehicle speed sensor 2 or B giving an intermittent or erratic...
P0528 OBD-II Trouble Code: Fan Speed Sensor Circuit Malfunction
P0528 P0528 code definition The P0528 code is the universal fault for fan speed sensor circuit no signal. This fault may be accompanied by other cooling system codes, such as P0480, or P0483. What the P0528 code means P0528 is...