Skip the auto shop - Our mechanics make house calls

Q: Knock sensor 1

asked by on

My engine light came on the other day. I scanned it with my OBD2 scanner and it came back saying "Knock sensor 1 Circuit low bank 1 or single sensor." I read online that since i got this warning i should be experiencing loud bumps or vibration but i am not experiencing any of this. I was wondering if i have a faulty sensor. What do you think?

My car has 192000 miles.
My car has an automatic transmission.

A: Hello there. The knock sensor code can have...

Hello there. The knock sensor code can have various causes on your 2004 Chevrolet Silverado. The knock sensor circuit low, bank 1 code is telling us that the knock sensor in bank 1 that it has low circuit voltage. This low voltage is caused by either a wiring harness fault to the knock sensor, or an internal fault to the sensor.

If the engine is knocking the knock sensors, it will detect it and retard the timing to prevent knocks, not trigger the Check Engine Light for low voltage. If you would would like to have a professional technician diagnose your knock sensor fault in person, consider YourMechanic, as a certified technician can come to your car’s location to pinpoint the problem.

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

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: Opinion on car theft through OBD port

Not really. A lot of it is just scam you know. People aren't stealing by plugging it in your car. First, they have to get in to begin with. The only time something like that happens is with high-end stuff...

Q: Vehicle is in limp mode. How can i reset it?

Unfortunately, Jaguar is pretty particular about keeping the procedures for clearing codes in house. You'll have to contact a Jaguar dealership or authorized repair facility to have them assist you here.

Q: My problem is Check Engine Light on. Cruise control does not work, loses power on hills, as if it does not want to pull hill.

Hi there. From the description you have provided, there is several possibilities for your vehicle's drivability problems. Your vehicle's Check Engine Light may help diagnose the lack of power and inoperative cruise control. Accessing the vehicle's computer for codes stored,...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...