P0204: Cylinder 4 Injector Circuit Malfunction
Severity: medium
What it means: The engine computer detected a fault (open circuit) in the cylinder 4 fuel injector's electrical circuit.
Safe to drive? Drive only to a shop. That cylinder may misfire.
Common symptoms
- Check-engine light
- Misfire or rough running on that cylinder
- Loss of power
Likely causes, ranked
- Damaged injector wiring or connectorDIY
- Failed fuel injector$464Shop
CarMD 2024 national average about $464
- Engine computer driver fault (rare)Shop
AD SLOT 1 (placeholder)
What it means: The engine computer detected a fault (open circuit) in the cylinder 4 fuel injector's electrical circuit.
Severity: Medium. Safe to drive? Drive only to a shop. That cylinder may misfire.
DIY or shop?
Check the connector and measure the injector's resistance. Injector replacement varies by engine.
Before you replace parts
- Read all stored codes and freeze-frame data. Fix misfire, fuel or sensor codes before chasing emissions codes.
- Check the simple things first: connectors, vacuum hoses, fluid levels and the gas cap.
- Clear the code only after a repair, then confirm it stays off after a few drives.
- Check your VIN for recalls and service bulletins.
Safety / mechanic note
Verify with a mechanic if you notice drivability changes, warning lights or overheating. A code points to a circuit or system, not always a specific part.
AD SLOT 2 (placeholder)