Ignition

Ignition: 4 pieces on carscan.app — what it means, what to look at in the live data and where to start. Open and free, no app needed.

Ignition is the most common reason an engine starts to misfire, jerk under acceleration and lose power. The fault is almost always one of three: the plug, the coil, or the wiring to it. Telling them apart costs nothing — swap the coil to a neighbouring cylinder: if the code moves, the coil is to blame; if it stays, the wiring is. In this topic we go through what the live readings show while it happens: misfire counts per cylinder, ignition advance, fuel trims.

Knock sensor: P0324, P0325, P0327, P0328

Lost power, higher fuel use, and a quieter engine under load? That is what a car looks like when it can no longer hear knock.

6 September 20263 min

P0335: the crankshaft sensor that stalls the car

A code that can stall the engine on the move and refuse to start a minute later. Where to begin, and why the part is not first.

5 September 20264 min

When to change spark plugs: signs and readings

Plugs die gradually and the car gets used to it. Here is what the numbers show before you feel anything.

5 September 20262 min

Misfires: P0300, P0301 and why you should not keep driving

The one group of codes where «it can wait until the weekend» costs more than the repair itself.

3 September 20262 min