Obd p0440. car wont stay running - 1998 Buick Riviera

the most common causes are vent solenoid and fuel cap
P0440 PONTIAC code possible causes

• Missing or loose fuel cap
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close
• Foreign matter caught in fuel filler cap
• EVAP canister or fuel tank leaks
• EVAP system hose leaking
• Fuel tank leaking
• Faulty vent solenoid
• Faulty EVAP purge switch

https://www.justanswer.com/pontiac/9xoy3-2000-pontiac-montana-3-4l-check-engine-light-p0440.html

https://www.yourmechanic.com/article/p0449-obd-ii-trouble-code-evaporative-emission-control-system-vent-valve-solenoid-circuit-malfunction-by-spencer-clayton

118, replace the coolant sensor. 440 is a small leak for EVAP. Could be as simple as replace the gas cap. 101 could be the MAF sensor or wiring to it. 300 is random misfire, needs to be on a scanner, Could be related to MAF sensor. 4401 is not a valid engine code.

Have a look at:

http://www.obd-codes.com/p0440

http://www.obd-codes.com/p0442


Your fuel cap may not be fitting properly...

It might be open door?

Hello,
Your error code of F411 appears to be not a valid code!
However,
The error code F440 stands for Evaporative Emission Control System Malfunction

Read more this problem at: http://www.obd-codes.com/p0440
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P0440 OBD II Trouble Code

Good Luck!
Rich Lilja

here's your code. P0440 OBD II Trouble Code

http://www.obd-codes.com/p0440

P0440 is Evaporative Emission Control System Malfunction http://www.obd-codes.com/p0440

Hi,

A quick Internet search on those codes pulled up the following info.
http://www.obd-codes.com/p0440

• Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
• Inspect the EVAP system for cuts/holes in tubes/hoses
• Inspect for damaged or disconnected hoses around the Evap purge solenoid
• Check and/or replace the sensor
• Check and/or replace the purge valve
• Have a professional use a smoke machine to detect leaks

http://www.obd-codes.com/p0300

• Faulty spark plugs or wires
• Faulty coil (pack)
• Faulty oxygen sensor(s)
• Faulty fuel injector(s)
• Burned exhaust valve
• Faulty catalytic converter(s)
• Stuck/blocked EGR valve / passages
• Faulty camshaft position sensor
• Defective computer