Fuel SystemModerate✅ DIY Friendly

P0261

Q: What does OBD2 code P0261 mean?

P0261 means: Cylinder 1 Injector Circuit Low. The fuel injector circuit for cylinder 1 is reading a lower resistance/voltage than expected.

Cylinder 1 Injector Circuit Low

The fuel injector circuit for cylinder 1 is reading a lower resistance/voltage than expected.

SeverityModerate

CategoryFuel System

Est. Repair Cost$150-$400

Code TypePowertrain

DIY RepairYes

⚡ Common Causes

›Faulty injector
›Damaged injector wiring
›Corroded connector
›Failed injector driver in ECM

⚠️ Symptoms

›Check engine light
›Misfire on cylinder 1
›Rough idle
›Reduced power

✅ How to Fix — Step by Step

Step 1:Test injector resistance
Step 2:Inspect wiring and connector
Step 3:Swap injector with another cylinder to isolate fault
Step 4:Replace injector if faulty

🔧 Diagnostic Tools Required

✔OBD-II Diagnostic Scanner
✔Digital Multimeter
✔Basic Hand Tools
✔Flashlight
✔Vehicle Service Manual

Using the correct diagnostic tools helps identify the root cause of P0261 before replacing parts unnecessarily. Always confirm the fault using live data and manufacturer-recommended diagnostic procedures.

💡 Pro Tip: Swapping the suspect injector with one from another cylinder is a quick way to confirm whether the injector or the wiring/ECM driver is at fault.

Frequently Asked Questions

What does OBD2 code P0261 mean?+

P0261 stands for Cylinder 1 Injector Circuit Low. The fuel injector circuit for cylinder 1 is reading a lower resistance/voltage than expected.

What causes code P0261?+

Faulty injector; Damaged injector wiring; Corroded connector; Failed injector driver in ECM

How do I fix code P0261?+

Test injector resistance; Inspect wiring and connector; Swap injector with another cylinder to isolate fault; Replace injector if faulty

How much does it cost to fix P0261?+

Estimated repair cost for P0261 is $150-$400.

Is P0261 DIY-friendly?+

Yes — P0261 is generally DIY-friendly with basic tools.