Skip the auto shop - Our mechanics make house calls

Q: Engine knocking and engine light on

asked by on

When I started my car today, the engine was knocking, so I gave it more gas, and it started fine. Then, the engine light came on.

Hello. If the Check Engine Light is on, then it would help to know what codes are coming up. The computer codes would help a mechanic find a starting point to determine the problem. From the description of the problem, this can be caused by a fuel injector that leaks excessive fuel into a cylinder, or it can be the start of an internal engine problem. A mechanic would definitely start with the codes. If you need further assistance, I recommend you have a mechanic, like one from YourMechanic, inspect the Check Engine Light and repair the damaged parts.

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
  1. Home
  2. Questions
  3. Engine knocking and engine light on

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: No reverse and will not down shift.

This may be a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission...

Q: What are the signsof a bad tensioner pulley?

The most common cause of noise in the front of the motor having to do with the accessories is the tensioner and idler pulley bearings get noisey. I have also seen where the a/c compressor pulley bearing gets noisey. You...

Q: Car body shaking

Hello! We really need to know the conditions when the car shakes. If it is at idle and the engine runs normally, you may have a bad motor mount. If the engine runs poorly, then it will need to be...

Related articles

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...
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...