P0307 MERCEDES-BENZ code

What the P0307 code means. When the P0307 diagnostic trouble code is stored by the Powertrain Control Module (PCM), it is an indication that a misfire has been detected in cylinder 7. More specifically, the PCM detects an increase or decrease in crankshaft revolutions per minute (RPM) that exceeds 2%.

What could cause a P0307 code?

P0307 Causes



Misfires can be caused by many reasons from a faulty ignition system, fuel system, or internal engine failure. The most common reason for this to happen is faulty or worn-out spark plug coil packs, especially if it’s been a while since you had a tune-up.

How much does it cost to fix a cylinder 7 misfire?

Is A Misfiring Cylinder Expensive To Fix? The cause of cylinder failure is a number of things. there are two most common misfire causes: Carbon or oil-fouled sparkplugs can cost between $100 and $300; replacing these plugs costs between $400 to $600.

Why is my number 7 cylinder misfiring?

Zitat von Youtube: First it could be that air fuel mixture component. Your engine needs a very specific mixture of fuel and oxygen. So if there's a vacuum leak somewhere in the car.

How do I fix code P0308?

Repairs that can fix the P0308 code would include:

  1. Replacing all the spark plugs and wires (and distributor cap and rotor if applicable)
  2. Replacing the distributor.
  3. Replacing the ignition coil(s)
  4. Replacing the fuel pressure regulator.
  5. Repairing a large vacuum leak.
  6. Replacing fuel injectors.
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How do I fix code p0302?

Zitat von Youtube: If the ignition coil is covered with engine oil or stains. Simply clean it with a wd-40 cleaner otherwise replace the damaged ignition coil with a new.

What is cylinder 5 misfire detected?

Diagnostic trouble code (DTC) P0305 stands for “Cylinder 5 Misfire Detected.” This means that the powertrain control module (PCM) has counted enough misfire events on cylinder 5 to store the misfire code for that cylinder.

Is it OK to drive with a cylinder misfire?

Driving with a misfiring cylinder is potentially dangerous. If you lose power while driving or a second or third cylinder goes out, this can cause you to get into a car accident, possibly injuring you and others around you.

Will tune up fix misfire?

A “tune-up” may help to resolve a misfire. A tune-up involves changing the spark plugs, ignition wires, distributor cap, and the rotor. It is a good place to start because it will eliminate some of the potential causes of a misfire if it does not already fix the issue completely.

Does misfire damage engine?

Over time, misfires can also damage your engine. When the fuel in the chamber does not burn properly, it can cause engine damage. As a result, fuel enters the catalytic converter, causing it to heat up, which can damage it. In addition, it can warp the valves and the cylinders, causing them to crack.

How do you test a coil pack?

Zitat von Youtube: That's one before you start the car and then you get grab your multimeter. Put it on DC voltage. Ground your black test lead and then on the connector. Side you start checking for voltage.

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What does multiple cylinder misfire mean?

When a P0300 trouble code is triggered, it indicates that misfiring occurs in random or multiple cylinders. This happens when there is a deficient amount of fuel being burned within a cylinder. Most cars have between four and six cylinders, with each cylinder firing a spark plug continuously and smoothly.