OBD CodesWhat it means
Each cylinder has an injector, an electric valve that sprays fuel. These codes are about the electrical circuit of an injector: the computer sees an open circuit, a short, or a current that is wrong. The last digits give the cylinder number.
Codes in this group
| Code | Meaning |
|---|---|
| P0200 | Injector circuit fault (cylinder not identified) |
| P0201 | Injector circuit fault, cylinder 1 |
| P0202 | Injector circuit fault, cylinder 2 |
| P0203 | Injector circuit fault, cylinder 3 |
| P0204 | Injector circuit fault, cylinder 4 |
| P0205 | Injector circuit fault, cylinder 5 |
| P0206 | Injector circuit fault, cylinder 6 |
| P0207 | Injector circuit fault, cylinder 7 |
| P0208 | Injector circuit fault, cylinder 8 |
| P0209 | Injector circuit fault, cylinder 9 |
| P0210 | Injector circuit fault, cylinder 10 |
| P0211 | Injector circuit fault, cylinder 11 |
| P0212 | Injector circuit fault, cylinder 12 |
Bank 1 is the side of the engine that has cylinder 1. Sensor 1 is before the catalytic converter and sensor 2 is after it. More terms explained.
What you may notice
- Engine shaking, as one cylinder is not working
- Loss of power
- Misfire codes for the same cylinder
- Fuel smell if an injector is stuck open
Common causes
Most likely first:
- A loose or corroded injector plug
- Broken wiring to the injector, often from engine movement or rodents
- A failed injector coil
- A fault inside the engine computer (rare)
What to check first
- Check the plug on the injector for the cylinder named
- Look for chewed or chafed wires on top of the engine
- A workshop can swap two injectors to see if the fault follows the injector
Have a mechanic confirm. A fault code tells you which system reported a problem, not which part has failed. The same code can have several causes, and they differ between car models. Use this page to understand the code, then have a qualified mechanic test the car before any part is replaced.
After the repair
Once the cause is fixed, the code can be cleared with a scan tool, or the warning light goes out by itself after several trips without the fault. Clearing a code without fixing the cause only hides it for a while. More about clearing codes.
Related codes
Mass air flow (MAF) sensor (P0100), Manifold pressure (MAP) and barometric sensor (P0105), Intake air temperature sensor (P0110), Engine coolant temperature sensor (P0115), Thermostat and engine warm-up (P0125), Throttle position sensor (P0120), Accelerator pedal sensor and throttle agreement (P2120), Electronic throttle actuator (P2100). All codes.
Written in November 2026. These are generic OBD-II codes, the same on all makes. Causes and repair steps differ between models.