Skip the auto shop - Our mechanics make house calls

Q: Car shuts off sporadically

asked by on

My car has had an intermittent problem with shutting off completely at certain situations. This occurs both while braking to a stop, like at the traffic light, as well as while accelerating from a stop. The car would shut off in these conditions and always at lower speeds. I would then have to put it in park and start it up again. There are no problems with starting the car. It starts immediately. The dealers cannot recreate the problem so they cannot solve it. No error codes came up. The repairs done so far include the alternator replacement and throttle valve control unit carbon buildup cleaning. What could be causing this?

There are numerous potential causes for your problem. One common issue with Volvos such as yours, is a faulty Electronic Throttle Module (ETM). It sounds like you had it cleaned, but it may need to be completely replaced. Using inputs from various sensors including the accelerator position sensor, the ECM uses a motor to open and close the throttle. A malfunctioning ETM can lead to engine performance problems such as stalling. I suggest you have your vehicle inspected by another mechanic to diagnose the stalling issue and see if this is indeed the problem. The team at YourMechanic is an excellent option since we make house calls.

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: 2006 Hyundai Sonata p2106 code how do I repair

This trouble code indicates an issue with the intake manifold runner circuit. This could be an issue with the wiring, the intake runner position sensor, or the powertrain control module. I would recommend having your vehicle inspected by a qualified...

Q: I hear a bird chirping type noise (or metal-on-metal) when accelerating

Hi there. The metal-to-metal sound coming from an engine during acceleration is commonly due to low oil levels. The sound is caused by the valves or cylinder head hardware clanking due to reduced oil pressure or improper lubrication. However, there...

Q: I have a 2004 Hyundai Santa Fe. It runs fine until I refuel. Then it doesn't start. it stalls unless I start driving with both feet.

Hi there. If this only occurs after fueling then it is usually an issue with the EVAP emissions system. It can be a solenoid or a hose issue so it needs to be fully inspected. When these issues occur it...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.