Q: When I speed up my service engine light flashes.

asked by on

Hey it's kidus, I bought a g35x Infiniti around last month my car was working fine and everything, last time while I was driving my service engine light started flashing as I speed up, when I drive 50km/hr it doesn't flash but when I speed up a little more it will start flashing it been doing that for at least 2 weeks now, I took it to the mechanic and they found "p0300" code and they said it's a random misfire but they don't really know what's causing the problem it got worse and worse now the light even flashes at 20km/hr one day when I was driving in a hill my car lost power I had to push the gas pedal really hard but it won't go up it's kept making some weird noise underneath the car and from the engine so Finally I took it to the Infiniti dealer and they didn't check my car yet but I'm just worried.

My car has 168000 miles.
My car has an automatic transmission.

Hi there. If you engine is having a P0300 code for a random misfire, check the camshaft position sensor for any moisture and if the harness has any broken wires. If the sensor looks to be good, then remove the sensor and pass a metal object in front of the magnet and check with a ohm meter to see if the sensor is making connections or not. If it does not make a connection, then the camshaft position sensor needs replaced.

For the noise that is heard, that could be the engine’s random misfire and cause backfire conditions in the exhaust around the lower portion of the engine or the timing of the engine (mechanically) could be off. If you need further assistance with a random misfire, then seek out a professional, such as one from Your Mechanic, to help you.

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. When I speed up my service engine light flashes.

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 won't start or turn over. After trying a few times and stepping on the gas, the car drives, but once the car is turned off the issue recurs.

Based on what you've described, it sounds like the starter is failing, although there could be other possible faults as well. The starter's internal contacts could be worn and not providing sufficient conductive surface to activate the starter motor. The...

Q: Q: Timing chain replacement

This vehicle has 3 timing chains and in order to align them up correctly you may need to purchase a repair manual or have the timing chain repair done by a qualified mechanic. These engines typically require special alignment tools...

Q: Excessive noise from camshaft

The noise you are hearing are probably the lifters. Over time, they will start sticking and will make a ticking noise. I would recommend having a technician come out to inspect the noise to make sure what the issue is....

Related articles

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...
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...