P0261

High Severity

Cylinder 1 Injector Circuit Low

Fuel System

What Does P0261 Mean?

Low voltage in cylinder 1 injector driver circuit.

Common Fix

Replace cylinder 1 injector

Estimated Cost (DIY)

$40 - $150

Symptoms

  • ⚠️Cylinder 1 misfire
  • ⚠️Rough idle
  • ⚠️Loss of power

Related Symptoms

Rough idle

Common Causes

Short in injector wiringlikely
Failed injector coilpossible
ECM driver issueunlikely

How to Diagnose P0261

  1. 1Check injector connector
  2. 2Measure injector resistance
  3. 3Check wiring for shorts to ground
  4. 4Replace injector if coil shorted

OEM Diagnostic Flowchart

Scroll to load technician if/then branches.

Read live data and freeze frame for P0261 to pinpoint the cause before buying parts.

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Related Resources

Repair guides, symptom pages, and wiring diagrams related to P0261.

OEM Manual Evidence

Browse →
2013 GMC Truck Terrain AWD V6-3.6L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Terrain AWD V6-3.6L Service Manual | Operation CHARM Operation CHARM : Car repair m...

2013 GMC Truck Terrain FWD V6-3.6L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Terrain FWD V6-3.6L Service Manual | Operation CHARM Operation CHARM : Car repair m...

2013 GMC Truck Acadia FWD V6-3.6L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Acadia FWD V6-3.6L Service Manual | Operation CHARM Operation CHARM : Car repair ma...

2013 GMC Truck Acadia AWD V6-3.6L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Acadia AWD V6-3.6L Service Manual | Operation CHARM Operation CHARM : Car repair ma...

Related Symptoms

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Rough idleSymptom Hub

Rough idle often traces back to ignition, air metering, vacuum leaks, or timing-related faults before it becomes a full misfire complaint.

Exact Vehicle Hubs

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2013 Gmc Truck Acadia Awd V6 3.6l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0261.

2013 Gmc Truck Acadia Fwd V6 3.6l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0261.

2013 Gmc Truck Terrain Awd V6 3.6l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0261.

2013 Gmc Truck Terrain Fwd V6 3.6l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0261.

Related Codes

P0201: Injector Circuit Malfunction - Cylinder 1Related

The fuel injector on cylinder 1 has a circuit fault. It may not be firing.

P0262: Cylinder 1 Injector Circuit HighRelated

High voltage in cylinder 1 injector circuit. Usually open circuit.

P0301: Cylinder 1 Misfire DetectedRelated

Cylinder 1 is misfiring — not firing properly. Could be spark plug, coil, injector, or compression issue on that specific cylinder.

Frequently Asked Questions

What is injector circuit low?
It means the ECM sees low voltage/resistance in the injector circuit, often from a shorted injector coil.
Can I test injector resistance?
Yes — unplug the injector and measure with a multimeter. Compare to specs (typically 11-18 ohms).

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