Skip the auto shop - Our mechanics make house calls

Q: When starting, car shakes and rattles and then quits

asked by on

When starting the engine, my car shakes and rattles and then eventually quits running. I know my o2 sensor needs to be replaced and I’m thinking this might be the cause of my car’s symptoms. After this happens, I turn it off and then restart the car. I have found a way to bypass this by starting the car, momentarily revving the engine, then immediately moving. If I don’t do this technique, it shuts off. Do you think the o2 sensor will fix this or is it something else?

Sounds like you aren’t getting enough fuel during "cold" start. First thing, check the cold start injector, and thermo time sensor, which regulates how long the cold start injector squirts. Next, check the Over-Voltage Protection relay and circuit. If this has failed, the cold start circuitry doesn’t get power. A YourMechanic professional can confirm this with a diagnosis of your stalling issue and replace failed parts.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine knocks

Engines can make a lot of different noises when there is something wrong. If it is extremely loud and consistent, your engine will need replaced. If it is ‘knocking” when the engine is cold and is quiet when it’s warm,...

Q: loud rattling noise when accelerating, somewhat quiet clicking noise when idling

Hello, thank you for writing in. In this kind of situation, the noise may very well be related to the recent work. Start by going back through as best you can without disconnecting too many things to verify your repair....

Q: Honda CRV 2005 VSA light on car is shaking while driving

Hello, thank you for writing in. The VSA (vehicle stability assist) light comes on steadily when there is a problem. If it blinks, it means the system is actively working to control the car and help it steer. If the...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.