P0200 Injector Circuit Malfunction

P0200 indicates a general injector circuit malfunction. The controller detected an electrical fault in one or more injector control circuits.

Code details

Generic OBD-II · P0

System: Injector
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace all injectors from P0200 alone; identify the affected cylinder or shared circuit first.

Symptoms of P0200

Check-engine light, often with a misfire feel from one cylinder.
Rough idle, hesitation, or a slight loss of power.
Higher fuel use, or in some cases a fuel smell.

Common causes of P0200

A stuck, leaking, clogged, or electrically failed injector.
Injector wiring, connector, or driver-circuit faults.
Low fuel pressure or contamination affecting injector behaviour.

Useful checks before replacing parts

Scan for cylinder-specific injector codes and compare injector command, misfire counters, fuel trims, and freeze-frame load conditions.
Check injector power feed, ground control, harness routing, connector fit, fuse supply, and driver circuit behavior under load.
Inspect for shared injector power faults, rubbed harnesses, water intrusion, and recent injector or engine harness service.

Related OBD-II codes

These nearby injector entries can help compare wording and pin down the fault area.