P0267

Universal

Cylinder 3 Injector Circuit Low

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Medium Severity

The engine computer has detected a low electrical condition in the circuit for the cylinder 3 fuel injector. The injector meters fuel into that cylinder, and the computer monitors its electrical circuit while controlling it. The code identifies an electrical condition, not proof that the injector itself has failed. Depending on the cause, the cylinder may receive too little fuel or operate irregularly, affecting engine performance and emissions.

Report an error with this code

⚠️ Before You Begin (Safety First)

If the engine runs very roughly, loses power, stalls, or the check-engine light flashes, avoid continued driving and arrange prompt inspection; a severe misfire can damage the catalytic converter or make the vehicle unsafe to drive. Stop in a safe place if the vehicle cannot maintain power reliably. Keep clear of moving or hot engine parts during checks.

Common Symptoms

  • The check-engine light may turn on, with no noticeable change in how the vehicle runs.
  • The engine may idle unevenly or misfire if cylinder 3 is not fueled consistently.
  • Acceleration may feel weak or hesitant if the cylinder contributes less power.
  • Fuel consumption or emissions may increase if engine operation is disrupted.
  • In a severe case, the engine may stall or run too roughly to drive safely.

Common Causes

  • A loose, damaged, or corroded connection at the cylinder 3 injector may disrupt its electrical circuit.
  • Chafed, broken, or otherwise damaged wiring may create a low electrical condition in the injector circuit.
  • The cylinder 3 injector may have an internal electrical fault.
  • A fault in the engine computer's injector control circuit is possible, but should be considered only after the circuit and injector are tested.

Diagnostic Steps

  1. Note whether the engine runs roughly, loses power, stalls, or has a flashing check-engine light; stop driving and seek help if operation is unsafe.
  2. With the engine off and cool, visually inspect the accessible cylinder 3 injector connector and nearby wiring for looseness, corrosion, rubbing, or obvious damage. Do not pull on wires or force a connector.
  3. If a scan tool is available, record other codes and relevant stored conditions before clearing anything; related codes can help guide diagnosis.
  4. Check the owner’s manual or vehicle-specific service information to identify the correct cylinder and safe inspection procedure; cylinder numbering varies by engine.
  5. If the connector and wiring look intact or the code returns, arrange circuit testing with the correct service information rather than replacing the injector based only on this code.

When to Call a Professional

A technician can confirm the affected cylinder and operating conditions with scan data, then inspect the injector connector and wiring and test the circuit using model-, year-, and engine-specific service information. Further checks may include injector command or current-pattern analysis and evaluation of the engine computer's injector driver. These tests help distinguish a wiring or connection fault from an injector or control-driver problem before parts are replaced.

Compare component listings

Confirm diagnosis and vehicle fitment before buying. A listing does not prove that a part needs replacement. We may earn a commission from qualifying purchases.

Search Amazon Search eBay

Commonly Asked Questions

Does this code prove the cylinder 3 injector is bad?

No. It identifies a low electrical condition in the cylinder 3 injector circuit. A connector, wiring, injector, or control-driver fault may be involved, so testing is needed to identify the cause.

What does “circuit low” mean here?

It describes an electrical condition detected in the injector circuit. The exact monitoring strategy and expected readings depend on the vehicle, so use model-, year-, and engine-specific service information.

Can I keep driving with this code?

If the vehicle runs normally, a cautious trip for diagnosis may be possible, but do not ignore the fault. Stop driving if it runs very roughly, stalls, loses power, or the check-engine light flashes.

Can I identify cylinder 3 by its position?

Not reliably without vehicle-specific information. Cylinder numbering and layout vary by engine; consult the service information for the exact vehicle.

Related Diagnostic Video

Browse Available Code Guides

Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.