P0267 — Cylinder 3 Injector Circuit Low #

Note: The wording for this DTC (Diagnostic Trouble Code) may vary between vehicle manufacturers. Always refer to your vehicle’s OEM (Original Equipment Manufacturer) documentation for exact descriptions.

• Cylinder 3 Injector Circuit Low (General, SAE standard)
• Injector 3 Control Circuit Low (Ford)
• Fuel Injector 3 Low Voltage (GM/Chevrolet)
• Injector 3 Circuit Low Input (Dodge/Chrysler)

Summary of DTC P0267 #

The P0267 code indicates that the engine control module (ECM)—the onboard computer managing engine operation—has detected an abnormally low voltage or resistance in the fuel injector circuit for cylinder 3. In simpler terms, there’s a problem with the electrical pathway responsible for delivering fuel to the third cylinder, and this could impact engine performance. The circuit includes wiring, connectors, and the injector itself. This code can be triggered for a variety of reasons, from a faulty injector to wiring issues. Pinpointing the root cause is essential for restoring proper engine operation and efficiency.

Common Symptoms for DTC P0267 #

When DTC P0267 is triggered, your vehicle is likely to show noticeable signs of trouble. Since the injector isn’t functioning correctly, cylinder 3 may not be receiving the right amount of fuel, leading to poor combustion and engine irregularities. You might notice:

• Check Engine Light illuminated on the dashboard
• Rough engine idle or engine misfire, especially at low speeds
• Increased fuel consumption and reduced fuel efficiency
• Loss of power or hesitation during acceleration
• Unusual engine vibrations
• Possible fuel odor from unburned fuel (in rare cases)

Probable Causes for DTC P0267 (Most to Least Common) #

The causes behind the P0267 code can range from simple electrical faults to internal component failures. Here’s a prioritized list based on likelihood:

1. Faulty fuel injector (Cylinder 3)—the internal coil may be shorted or open.
2. Damaged or corroded injector wiring/connectors—poor connections can lower circuit voltage.
3. Open or shorted wiring in the injector circuit—broken, pinched, or burned wires.
4. Failed engine control module (ECM/PCM)—rare, but possible if all else checks out.
5. Blown fuse or faulty relay serving the injector circuit.

Step-by-Step Diagnosis for P0267 #

Diagnosing P0267 requires a systematic approach to avoid replacing unnecessary parts. A digital multimeter and a scan tool are essential. Here’s a proven process:

• Step 1: Confirm the code with an OBD-II scanner and check for related codes (e.g., misfire codes for cylinder 3).
• Step 2: Visually inspect the injector and wiring for cylinder 3—look for disconnected, damaged, or corroded connectors.
• Step 3: Use a multimeter to check resistance (ohms) across the injector terminals. Compare with OEM specs.
• Step 4: Check for voltage at the injector connector with the key ON. There should be battery voltage present.
• Step 5: Perform a “wiggle test” on the wiring harness while monitoring values to spot intermittent faults.
• Step 6: If wiring and injector test fine, check the ECM/PCM output and ground circuits for continuity and shorts.
• Step 7: If all checks are normal, consider ECM/PCM failure as a last resort.

Possible Repairs for P0267 #

Repairs will depend on what you uncover during diagnosis. Addressing the root cause is crucial for lasting results:

• Replace the cylinder 3 fuel injector if it tests faulty or out of specification.
• Repair or replace damaged wiring or connectors in the cylinder 3 injector circuit.
• Replace a blown fuse or faulty relay that powers the injector circuit.
• Clean corroded connectors and apply dielectric grease for protection.
• Replace or reprogram the ECM/PCM—only after all other possibilities are exhausted.

Is It Safe to Drive with Code P0267? #

Limited: It’s generally not safe to drive for extended periods with code P0267 active. While you might be able to limp home or to a repair shop, a misfiring cylinder can cause increased emissions, poor fuel economy, and potential long-term engine damage—especially to the catalytic converter due to unburned fuel. For your engine’s health and your safety, address this issue as soon as possible.

Vehicles Most Commonly Affected by P0267 #

While P0267 is a generic code, certain makes and models tend to experience it more frequently due to design or component issues. The following vehicles are commonly associated with this code:

• Ford F-Series (F-150, F-250, etc.)
• Dodge Ram trucks
• Chevrolet Silverado and GMC Sierra
• Jeep Grand Cherokee
• Volkswagen TDI models
• Many GMC/Chevrolet vans and SUVs

Common Mistakes & Best Practices for P0267 #

Rushing into repairs without a thorough diagnosis can lead to wasted time and money. Technicians and DIYers often overlook some basic steps:

• Replacing the injector without first checking the wiring and connectors.
• Assuming the ECM/PCM is faulty before testing all circuits and components.
• Ignoring related codes that could point to a larger issue (such as multiple injector faults).
• Failing to clear the code and test drive after repairs to confirm the fix.
• Not using OEM-approved replacement parts or procedures.

Quick FAQ for Code P0267 #

Here are some fast answers to common questions about P0267:

• Q: Can dirty fuel cause P0267?
  A: While dirty fuel can affect injector performance in general, P0267 is specifically about an electrical circuit problem, not fuel quality.
• Q: Will a fuel injector cleaner fix this code?
  A: No—since P0267 is triggered by low voltage or resistance in the injector’s electrical circuit, physical cleaning of the injector won’t solve the issue. Electrical diagnosis is required.

If you have further questions about P0267 or need vehicle-specific advice, consult your OEM repair manual or a qualified automotive technician.