This code usually needs a check soon to find out what is wrong.
Trouble codes · P0202
P0202 meaning
Cylinder 2 Injector A Circuit
The same first verdict Car Assist shows from this code alone, before a diagnosis. The code does not tell the app whether the warning light is flashing.
What this code doesn’t tell you
A code says where the car noticed a problem. It does not prove which part failed, whether the fault is still present, or what repair this car needs. The engine, other codes, freeze frame and live readings matter.
Usual causes, most likely first
The order is a starting point across cars; the exact engine and its readings can change it.
- Damaged wiring or a loose connector at the cylinder 2 injector
- Failed injector coil at cylinder 2
- Injector driver fault in the engine computer
What you can check
Note any misfire, rough idle or loss of power. With the engine off and cold, look from above for a connector disturbed during recent work. Have the circuit tested before replacing the injector; cylinder 2 is numbered by the manufacturer.
Words the car uses
- Stored codes
- Faults the car has confirmed and saved. They help explain a check-engine light, but a code alone does not prove which part needs replacing.
- Freeze frame
- A snapshot of the engine's readings when a fault was recorded. It helps show the conditions that caused the fault, even if the car now seems fine.
- Readiness monitors
- The car's own checks of its emissions systems. An unfinished check means the car has not tested that system yet, so a clean code scan may miss a fault.
- Fuel supply pressure
- The pressure supplying fuel to the engine. Too little or too much can cause hard starting or poor running.
- Misfire
- A cylinder has failed to burn its fuel properly. It can cause shaking and loss of power; a flashing check-engine light usually means stop when safe and switch off the engine.
Find out what’s causing yours
Car Assist reads your car through an OBD-II adapter and your iPhone. Its assistant uses the codes, freeze frame and live readings to work through the likely cause with you.