Q: Car jerking and hard to start

asked by on

My van is jerking and doesn't start right away, and the Engine Light stays on. Auto Zone said I have a heated oxygen sensor: "bank 1 sensor 1 (hHO2811) circuit no activity detected - faulty bank 2 sensor"

I wouldn’t jump the gun and replace O2 sensors yet. When the engine is cold and first starts, the O2 sensors are not used until they warm up. A poorly running engine, and/or exhaust leaks, can cause false O2 codes. First of all, the engine will need to be checked for the root cause of the jerking and start difficulty. This could stem from an issue with the ignition or spark plug, with the battery or charging system, or with the fuel system. Once this is repaired, clear the codes and see if they return. I recommend having a top-rated mechanic, such as one from YourMechanic, come out to your home or office to run a diagnostic inspection of your start difficulty, and suggest the best path to repair.

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. Car jerking and hard to start

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: Can my car drive 350 miles with this issue?

There are several possibilities for the issues you've described, but I would look more towards a belt being the issue. It could be the belt, belt tensioner, air conditioning compressor, the alternator, or one of the other belt driven accessories....

Q: Q: Do I need a new alternator?

I would recommend having your alternator tested for proper function with a digital multimeter by a qualified technician. This test will determine if the alternator is charging the battery at the proper levels. If the alternator is not charging the...

Q: O2 sensors changed, but check engine light still showing code after clearing it I checked fuse. Wires are good and used Denso OE.

Depending on what the code was for will determine if the oxygen sensor was to be replaced. If the conditions were for a rich or lean mixture and it said oxygen sensor, then the spark plugs and wires could need...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.