Q: P0300, P0303, P1313, and P1314 codes are read on the scanner.

asked by on

Engine is misfiring. Engine hunts sometimes while coasting. Have replaced the spark plugs, ignition coils, and the catalytic converter under the engine. Still no difference.

My car is a 1997 Jaguar XJ6. My car has 170000 miles.
My car has an automatic transmission.

Hi there. The codes p0300 and p0303 are for the engine having a misfire. P0300 is for a random misfire where p0303 says that cylinder 3 had a misfire all the time. The code p1314 means that the catalytic converter is under a lot of stress and is burning too hot. The code p1313 means that the camshaft position sensor is hunting for a signal and is communicating with the O2 sensors. Check the camshaft position sensor and see if the harness is hooked up and has no broken wires. If the harness is in good condition, then I recommend replacing the camshaft position sensor for it has failed internally. 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. P0300, P0303, P1313, and P1314 codes are read on the scanner.

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: I got my RPMS too high before shifting into third gear. Is it possible that I blew the cam seal?

Hey there. The engine computer will limit the maximum RPMs your engine will go before it limits it from over revving. This limit will feel like a sudden loss of power with the power then coming back. Revving the engine...

Q: Q: Engine takes to long to warm up I've replaced thermostat already and it misses horrible till it warms up its a 4.9 engine

This engine uses a cooling fan clutch that controls the fan speeds on demand when the engine radiator starts to get hot if increases air flow to cool the engine down and slows the fan when it needs to increase...

Q: My battery is dead and I lost my keys. What can I do. 2003 Jeep Grand Cherokee

Hello. If your battery is dead and you have lose your keys then both of these issues will need to be addressed together. The battery issue will need to be taken care of first. Either it will need to be...

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...
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...