Skip the auto shop - Our mechanics make house calls

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Car was working fine then randomly shut off and will not turn back on, check engine light came on after the car turned off.

Hi there. First you would need to check for any codes that could be stored or pending on the ECM (computer). The code will direct you to the location area that could be the cause of the noise that occurred...

Q: The van stalls, jerks and hesitates

GM has a TSB out concerning clogged injectors that may cause all of the rough running/no start symptoms that you are experiencing. A professional fuel injector cleaning may help correct these various engine running issues. The procedure does require special...

Q: My car has the OBD-II codes P0030 and P0135 for the heater control circuit and sensor. Where is this sensor located?

This is a code that pertains to the heater side of your oxygen sensor. The heater is required to raise the temperature of the sensor so that it can operate properly. Simply unplugging relays/fuses will not keep the code from...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.