Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-83728-a8os31js:136:3912)
    at m.mountComponent (/tmp/execjs20161208-83728-a8os31js:47:15602)
    at /tmp/execjs20161208-83728-a8os31js:49:31860
    at a.r.perform (/tmp/execjs20161208-83728-a8os31js:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-83728-a8os31js:49:31821)
    at r (/tmp/execjs20161208-83728-a8os31js:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-83728-a8os31js:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-83728-a8os31js:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-83728-a8os31js:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-83728-a8os31js:173:8

Q: What happens if I don't replace knock sensor?

asked by on

what happens if knock sensor is not replacced

My car has 200000 miles.
My car has an automatic transmission.

A: The knock sensor on the engine is there to ...

The knock sensor on the engine is there to detect for an engine noise from pre ignition (pining) normally. This is so the computer can advance the ignition timing to the maximum it can without the engine pinging. This gives you the best engine power and fuel mileage.

If the knock sensor is not working then the engine could start pinging without the computer being able to detect it. This pinging can cause the combustion process to burn or blow holes in the pistons.

If an engine has an internal engine noise from a rod or piston knock problem it can cause a knock sensor to keep detecting a knock and the computer will keep reducing the ignition timing until a set limit is met and the computer will set a code for the knock sensor. Have the engine checked for internal problems that could be causing the knock sensor code.

If the knock sensor is bad through testing then if it is not replaced the engine may have reduced power, loss of fuel mileage, and hesitations. If you need help the replacement of the sensor or need to resolve any of these conditions, consider YourMechanic, as one of our mobile technicians can come to your location to diagnose and service your vehicle.

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・Save up to 30%

Get a quote

What others are asking

Q: After fuel pump replacement, no power getting to fuel pump - 1991 Toyota Supra Automatic

I would start with clearing the security issue, because utilizing the wrong key (or a bad door sensor) can disable the fuel injection and fuel pump once the security system arms, as your mechanic notes. Once the security system is...

Q: Engine has difficulty starting

If the vehicle starts you can essentially rule out a problem with the starting or charging system. So, forget the starter. There are numerous potential causes for the symptoms you are experiencing, but one thing that comes to mind is...

Q: Toyota Venza 2000 idles at high RPMs

Watch my video "how to fix a car that idles poorly." A lot of times, it is that simple. You take the air duct work off that goes into the throttle, get the rubber duct off, get some spray throttle...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...