Q: SES blinking due to the car shaking while in idle or if the AC on, or accellerating?

asked by on

My car was fine until I had work done for it to pass inspection. Now it is slow to accelerate, shakes in idle, shakes worse if the AC is on & feels like it's going to stall. SES light was blinking but now it on steady.

My car has 143444 miles.
My car has an automatic transmission.

I’m wondering if, during the course of the work, an electronic component or components, such as a sensor, was mistakenly not re-connected or the connection has come loose, thus causing the poor operation that you are writing in about. A blinking service (or check engine) light typically signifies active misfiring. If the light is blinking you want to try not to drive the car because the catalytic converter can get damaged from "active" misfiring. At this point, with a steady light, the engine should still be diagnosed, and repaired, as soon as possible as you may have intermittent misfiring, also not good.


The recommended service to resolve your issue is a check engine light diagnostic. During such a diagnostic, a certified mechanic from YourMechanic would use a code scanner to retrieve diagnostic trouble code(s) from your car’s PCM. Using those codes the appropriate individual vehicle components or sub-systems (often a sensor, circuit, and the like) are tested to pinpoint the cause of the fault or the reason why the check engine light has illuminated. Once the faulty part or component is identified, it is explained to your satisfaction and the mechanic will let you know of the cost to repair. If you schedule the recommended diagnostic, the mechanic will resolve this promptly for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. SES blinking due to the car shaking while in idle or if the AC on, or accellerating?

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: After about 15 minutes of running, if my car gets close to a stop it dies. Why does it do this?

Hello. We will be happy to assist you. The issue your S500 has is likely related to an electrical sensor, such as a cam position sensor or crank position sensor. After several years in use the sensors can be subject...

Q: If tdc is on exhaust stroke will it have 10psi on cylinder 1

Most engines will need at least a minimum of 100 psi per cylinder in order to run. In addition, for the motor to run efficiently, this also requires a variance of less than 10% from cylinder to cylinder on this...

Q: Q: my car won't start.

Hi. It sounds like the problem is poor battery ground. If the battery doesn't have a good enough ground to the engine, the starter will not be able to pull the requires amperage from the battery to start the engine....

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...