Q: Periodically vehicle runs rough at idle.

asked by on February 15, 2017

Periodically, the vehicle will run rough at idle. Turn the car off and restart and runs fine. Most of the time, the vehicle runs fine. Recently, went to obtain an emissions inspection and the test identified the following codes: P0313, P0300, P1085, P1353, P0155, P1345, P1347, P1343, P0171, and P0741. I have had the P0741 check at a transmission shop. They could not identify and issues with the operation of the transmission.

My car has 133400 miles.
My car has an automatic transmission.

Hi there. Most of the codes that are coming on are for a misfire on cylinder number 3. Check the spark plug and wire on cylinder 3 and see if you are getting a good spark. Then check the fuel injector on cylinder 3 to see if its working by unplugging it. If the cylinder changes and makes the engine act up even more, then the fuel injector is working. If there is no change, then either the injector is not firing or the cylinder has a loss of compression in the cylinder. At that point you would want to check for compression on cylinder 3 to determine if it’s a fuel issue or an internal issue.

For the transmission code, the torque converter clutch solenoid has failed in your transmission and needs replaced.

If you need further assistance with your engine misfiring, then seek out a professional, such as one from Your Mechanic, 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

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

when i start my 2001 jeep Cherokee up, there is an electronic humming sound

Hello, thank you for writing in. Walking through the diagnostic process, we can rule out the wheels and suspension as a cause for the humming, as it happens as long as the car is running. The next step is attempting...

Engine losing power, gas pedal unresonsive

Hello there, a few common faults can cause these type of symptoms. The most common would be the vehicle going into limp mode, a fuel pump problem, bad spark plugs, faulty MAF sensor, a vacuum leak, or faulty oxygen sensor....

front end vibrates when in park and at stop lights

Hello there, many faults will cause your 2008 Mazda 3 to have a vibration at idle. The most common would be a misfire condition, fuel pump, vacuum leak, oxygen sensor, mass air flow sensor, or a coil. A qualified Technician...

Related articles

P0549 OBD-II Trouble Code: Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1
P0549 means the ECM found a fault with the exhaust gas temperature sensor circuit, caused by its damage or related electrical issues.
P0594 OBD-II Trouble Code: Cruise Control Servo Control Circuit/Open
P0594 code means there is an malfunction in the electrical components of the cruise control servo circuit often due too liquid spills or blown fuses.
P0736 OBD-II Trouble Code: Reverse Incorrect Gear Ratio
P0736 code means the PCM has detected an abnormality in the ratio of a particular gear often due too a faulty shift solenoid or dirty fluids.