Having problems with your 2002 Chevrolet Avalanche ?

Service engine soon light came on.

\015 I went to Autozone and got the code PO446. Any suggestions\015 Posted / edited by AnonymousUser on : 30-11-2020

Answers :

Computer thinks the pressure is wrong in the EVAP cannister. Cannister could be plugged, vent hose could kinked, sensor messed up, or the vent solenoid is busted.
\015\012
\015\0121. Loose/faulty gas cap.
2. Evap Canister problem - bad solenoid, leakage, etc.
3. Bad fuel tank pressure sensor.
That is an EVAP code. its a vent control code. you can manually test it by powering it up if you know where its at. i cant remember exaclty where its at off the top of my head but its only 2 wires. using a volt meter you want to make sure power is getting to it, but you cannot activate it without dealer scan tool.hmmm if you can figure out which is ground and power when you give it 12 volts it should click. meaning your vent solenoid works and you have wiring problems or its leaking.
\015\012
\015\012 EVAP problems are hard to finde with out scanners. you can change the vent solenoid and hope it fixes it. but a code points you to the direction of a problem. hopefull its not wiring problems. in the northern states with snow. ice can pull out wires and also get clogged in the vent solenoid and lock it up. its either wiring or bad or a leaking solenoid. check condition of wires. if they look good try a vent soleniod.
\015\012
\015\012if that doesnt fix it after a engine light reset and 2 weeks or so. then goto dealer. you need to reset it after repair. light will not go off on its own.GOOD LUCK
\015\012
\015\012Michael
\015\012ASE certified.
\015\012plz rate
Repair Help & Product Troubleshooting for 2002 Chevrolet Avalanche

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.

Suggested Questions/Answers :

Loading ...

  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || carrestorationshop.com || Terms of Use || Contact || Privacy Policy
Load time: 0.0086 seconds