Skip the auto shop - Our mechanics make house calls

Q: EVAP 1

asked by on

The computer told me it was EVAP 1 I replaced the EVAP 1 and the computer still says EVAP 1 is bad and I replaced the back end EVAP also but I didn't replaced the gas cap do you think that could be the reason for the engine light being on and the truck is riding hard also that's way I said I was going to replaced the ECU or the ECM

A: The code you are getting will have a pinpoi...

The code you are getting will have a pinpoint test to follow like directions to follow. Depending on the code you received will depend on the parts involved. I would recommend writing down the code, disconnecting the battery, and then disconnecting the ECM connections. You should then add some dielectric lube to the connector and pins lightly. Once that is done, reinstall the connections.

If the problem returns then have the code pinpoint tested to isolate the fault. The ECM is most likely not the faulty part. It may just be connections issues at the ECM or a component. You can try getting a new gas cap since it is an inexpensive possible problem. If you'd like to get this fixed, have one of our mobile experts diagnose your Check Engine Light first person and make the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Escalade suddenly stop moving like it's in neutral.

Hello. Most of the time this occurs when the fuel pump fails. The lack of fuel pressure will cause the engine to lose all power which will feel like a transmission issue. This will then cause the engine too cut...

Q: Low oil pressure light

Oil pump failure can happen on high mileage vehicles. This is normal due to engine wear and oil pump wear. Before replacing the oil pump, I would suggest having it properly inspected. A qualified mechanic can perform an oil pressure...

Q: Ac vents not blowing

If your system is vacuum operated you should see hard plastic black colored lines and there should be a visible line through the firewall. If no such lines are visible, your system is electronically controlled. If vacuum operated, you can...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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.