What does it mean when your check engine light says gas is leaking?
If you get an error pointing to the gas cap, it means fuel vapors are leaking out of your cap. This means it’s either cracked or just wasn’t tightened well enough.
What should I do if my check engine light keeps coming on?
A certified mechanic with YourMechanic can inspect and diagnose the fuel tank system at your home or office. The fix recommendation would be to replace the evaporative vent solenoid and the fuel tank cap. The statements expressed above are only for informational purposes and should be independently verified.
Can a vacuum leak cause a check engine light?
This could result in fuel trim problems and a check engine light, possibly with Fuel System Rich DTCs, such as P0172 or P0175. Some older power steering systems idle-up the engine using a vacuum switching valve (VSV), but a vacuum leak might stall the engine during a parking maneuver.
What happens if you have an intake leak in your car?
Major intake leaks might prevent the engine from starting at all. Fuel Economy and Emissions The lean air-fuel ratio will burn hotter and increase the generation of oxide emissions, such as nitrogen oxide (NOx) and sulfur oxide (SOx). Even if the check engine light isn’t triggered, the vehicle may still fail emissions testing.
If you get an error pointing to the gas cap, it means fuel vapors are leaking out of your cap. This means it’s either cracked or just wasn’t tightened well enough.
What are the codes for GMC check engine lights?
P1245Intake Plenum Switchover Valve P1250Early Fuel Evaporation Heater Circuit P1257Supercharger System Overboost P1258Engine Coolant Overtemperature – Protection Mode Active P1260Last Test Failed SCC Or Theft Detected, Vehicle Immobilized
Alternately, you can purchase a gas cap for a few dollars online or at an auto parts store. All you need to do is take the old one off and screw on the new one. If you’ve already made it to the store, you might as well replace it. While not car-threatening, it’s good to take care of this right away to improve gas mileage.
Where is the trouble code on a GMC?
When retrieving GMC trouble codes with an OBD II scan tool, proceed as follows: 1. Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may have a removable cover. 2. Turn the ignition on.