Question about 2007 Toyota Yaris

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Stops accelerating and check engine light comes on

My car will stop accelerating and the check engine lights come on.

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  • Anonymous Mar 14, 2014

    acceleration problems at low speeds and at a stop intermittent

  • Anonymous Mar 15, 2014

    03 Highlander with engine light on and shakes when accelerating or coming to stop

  • Anonymous Mar 18, 2014

    Can you help?



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  • 243 Answers

The check engine light indicates a fault in the engine management systems. Your car has stopped accelerating because it is locked in fail safe mode and normally you should be able to accelerate just enough to limp to the dealer where they wil scan the computer.

Posted on Nov 09, 2008


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Posted on Jan 02, 2017

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SOURCE: 2001 Isuzu Rodeo 54248 miles


If problem is only on startup and when idleing, then the problem is likely IAC system, also a vacuum leak will cause the same problem.

If problem is not only on startup and idle, but also when driving, then MAP sensor and EGR system must be checked.

Check also accelerator cable state and setting.


The first thing to do is pulling out the OBDII fault codes stored in the ECM. This is done connecting a code reader to the ECM diagnostic port. The job can be done for a small fee at any local garage, and it is done for free at AutoZone.

The codes will help locating the problem.

About possible faults:

Problem is stalling when idling and during startup, but engine idling fast all the time. Problem not starting at times it is due to the fact that the wrong mixture is being sprayed, this is probably causing flooding and misfire. Since the CEL is on, one of the codes returned is probably misfire.

Check accelerator.

Check IAC system. This is composed by a valve and a solenoid that check and control amount of extra air air when the engine is idling. The IAC valve is located on top of the throttle body.

Check the vacuum system and try cranking with gas tank cap off. Vacuum system is tested using an hand tool gauge onvacuum lines while spraying card cleaner on the hoses (or heating them with a torch). If there is a leak, pressure will go up. A big leak will also do hissing noise, and will often result in a lean code when doing an OBD code scanning.

This kind of symptoms can also be caused by weak wiring to MAP/MAF sensor (MAP in this engine).

If the car also drives very rough and is revving up and down in a weird way, check the EGR valve.

As first thing I would do a code scanning. This car is OBDII. The scan can be done for free at the nearest Autozone, or for a small fee at any garage.

If you get any OBDII code from the scan, report it here, so that we can individuate the possible reason for the problem.

If you repute my solution helpful, then please take some times to accept the solution. Providing good repair tips requires time and skills, and your feedback is important for us.



Posted on Oct 26, 2010

  • 6674 Answers

SOURCE: Engine shudders when idling in gear, check engine light on

Take a run into Autozone, or Pep boys, or similar big autoparts store and they will do a free code scan, to point everyone in the right direction instead of guessing, and throwing parts at it. If the fix isn't obvious after codes recorded, get back to us with code(s) and will help you out if still needed.

Posted on Dec 04, 2009

  • 60 Answers

SOURCE: Hesitat when Accelerating

check your plugs and leads. do you think you may have dirty fuel?

Posted on Aug 04, 2009

  • 130 Answers

SOURCE: Check engine light comes on

check your oil level

Posted on Mar 25, 2011

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