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: My car makes a knocking noise. It does it a little when I press the breaks. Sometimes I can drive it and no knocking noise then ot

Before you drive the car again, you need to find the lug wrench and check to be sure that all your wheel lugs are tight You might have one or more loose wheels. If you don't find a problem there,...

Q: Engine chugging at low speeds when the weather is bad

It is very possible that moisture is getting into the connectors of the engine control module. The connectors should be checked and cleaned if necessary. Di-electric grease can be used to help seal the connectors and keep the moisture out....

Q: All 4 heated O2 circuit high, and alternator not charging

As you may know, the alternator is unrelated to the O2 sensors and these will not impact the charging of the battery. The charging issue may be related to a bad voltage regulator which is a unit that monitors the...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...