CarFix Answers

P0201: Cylinder 1 Injector Circuit Malfunction

Severity: medium

What it means: The engine computer detected a fault (open circuit) in the cylinder 1 fuel injector's electrical circuit.

Safe to drive? Drive only to a shop. That cylinder may misfire.

Common symptoms

Likely causes, ranked

  1. Damaged injector wiring or connectorDIY
  2. Failed fuel injector$464Shop

    CarMD 2024 national average about $464

  3. Engine computer driver fault (rare)Shop
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What it means: The engine computer detected a fault (open circuit) in the cylinder 1 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

  1. Read all stored codes and freeze-frame data. Fix misfire, fuel or sensor codes before chasing emissions codes.
  2. Check the simple things first: connectors, vacuum hoses, fluid levels and the gas cap.
  3. Clear the code only after a repair, then confirm it stays off after a few drives.
  4. 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.

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Sources