P0274
Fix within a few daysCylinder 5 Fuel Injector Circuit High
Code P0274 means Cylinder 5 fuel injector circuit has a high voltage condition. Common causes: Faulty injector (70%), wiring issues (25%). Drivability: Yes, for short trips, but fix quickly. Repair cost: $50-$150 DIY, $200-$500 professional.
Can I Drive With P0274?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy acceleration. Fix immediately.
Stop driving immediately if: Flashing Check Engine Light, loud knocking noises, burning smell, significant power loss, or engine stalling.
Symptoms of P0274
- 1Check Engine Light is on
- 2Engine misfire or rough idle
- 3Reduced engine power
- 4Poor fuel economy
- 5Engine hesitation during acceleration
- 6Engine may run rough or stall
Common Causes of P0274
Parts most likely causing this code, ranked by probability
The fuel injector for cylinder 5 has an internal electrical fault causing a high resistance or open circuit.
70% of P0274 cases are fixed by replacing this part
There is an open circuit, short to voltage, or a poor connection in the wiring harness or connector leading to the Cylinder 5 fuel injector.
25% of P0274 cases are fixed by repairing this part
The engine control module's driver circuit for the Cylinder 5 injector is faulty, sending an incorrect signal.
5% of P0274 cases are fixed by replacing this part
Check These First (Before Buying Parts)
- Visually inspect the electrical connector on the Cylinder 5 fuel injector for any signs of damage, corrosion, or looseness. Ensure it's fully seated.
- Check the wiring harness leading to the injector for any visible cuts, chafing, or signs of rodent damage.
How to Diagnose P0274
- 1Visually inspect the wiring harness and connector for Cylinder 5 fuel injector for damage, corrosion, or loose connections.
- 2Using a multimeter, check the resistance of the Cylinder 5 fuel injector; compare it to specifications and other injectors.
- 3With the engine running, use a noid light to check for a proper pulse signal at the Cylinder 5 injector connector.
- 4If resistance and pulse are good, swap the Cylinder 5 injector with an injector from another cylinder to see if the code moves.
- 5If the code persists after swapping injectors and wiring is confirmed good, test the ECM/PCM injector driver circuit.
P0274 on Popular Vehicles
Ford F-150
2004-2024P0274 on Ford F-150s, particularly those with the 5.4L or 5.0L engines, is frequently due to a failed fuel injector. The injector can develop an internal electrical fault.
75% fixed by replacing the fuel injector
Chevrolet Silverado
2007-2024For Chevrolet Silverado trucks, P0274 often points to a faulty fuel injector on cylinder 5. Inspecting the injector harness for chafing or damage is also important, as wiring issues can occur.
70% fixed by replacing the fuel injector
Honda Accord
2003-2024While less common than on trucks, P0274 on Honda Accord models typically indicates a failed fuel injector. Always check the injector's electrical connector for corrosion or looseness first.
65% fixed by replacing the fuel injector
Frequently Asked Questions
What does P0274 mean?
P0274 indicates that the Engine Control Module (ECM) has detected an electrical fault, specifically a 'high' condition, in the circuit for the fuel injector on cylinder number 5.
Can I drive with P0274?
Yes, for short trips only. You will experience reduced engine power and rough running. Prolonged driving with a misfire can cause significant damage to your catalytic converter.
Will P0274 clear itself?
No, P0274 will not clear itself. This code indicates a hard electrical fault that requires diagnosis and repair. The Check Engine Light will remain on until the underlying issue is resolved.
How do I fix P0274 myself?
Start by inspecting the wiring and connector for the Cylinder 5 fuel injector. If the wiring is good, test the injector's resistance with a multimeter. If the injector is faulty, replace it. If the wiring is damaged, repair it.
How much does it cost to fix P0274?
A DIY repair for P0274 typically costs $50-$150 for a new fuel injector. Professional repair at a shop will cost $200-$500, which includes diagnosis, parts, and labor.
P0274 keeps coming back - why?
If P0274 keeps returning, it points to an intermittent wiring issue that was missed, a faulty replacement injector, or a rare ECM problem. Recheck all connections and wiring thoroughly, and consider testing the ECM's injector driver.
Will P0274 fail emissions/smog test?
Yes, P0274 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on is an automatic failure, and a misfire increases harmful emissions.
What's the difference between P0274 and P0305?
P0274 specifically indicates an electrical circuit fault with the Cylinder 5 fuel injector. P0305 indicates a general misfire detected on Cylinder 5, which can be caused by a faulty injector, spark plug, ignition coil, or compression issue.
P0274 on Ford F-150?
On Ford F-150s, P0274 is most commonly caused by a failed fuel injector for cylinder 5, especially on higher mileage vehicles. Wiring issues are less common but still occur. Always start with injector testing.
Questions to Ask Your Mechanic
Did you test the resistance of the Cylinder 5 fuel injector and compare it to specifications?
Good answer: Yes, the resistance was X ohms, which is outside the acceptable range of Y-Z ohms, confirming an internal fault in the injector.
What did you find when you inspected the wiring harness and connector for the Cylinder 5 injector?
Good answer: I found a corroded pin in the connector, or a section of the wire was chafed and shorting to ground. I repaired the wiring.
Repair Cost Estimate
DIY Repair
Parts only
$50-$150
Shop Repair
Parts + labor
$200-$500
Save $150-$350 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate - requires basic mechanical skills, a multimeter for testing, and potentially a noid light. Access to the injector can vary by vehicle.
Cost of Waiting
Continued driving with P0274 and a misfiring cylinder will send unburned fuel into your exhaust system. This rapidly overheats and destroys your catalytic converter, turning a $50-$150 injector repair into a $800-$2,500 catalytic converter replacement.
While You're In There...
These seals are removed and often disturbed during injector replacement. Replacing them prevents fuel leaks and ensures a proper seal.
A misfiring injector can foul the spark plug. Replacing it ensures optimal combustion after the injector fix and prevents a future misfire code.
Tools You'll Need
- Basic hand tools (sockets, wrenches)
- Multimeter
- Noid light (recommended)
- Fuel injector puller (some applications)
- Torque wrench
P0274 is a common fuel system code. Most repairs involve replacing a single fuel injector, which is a straightforward job for an intermediate DIYer, and your engine will run smoothly again.
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Your Next Steps
Step 1: Perform a thorough visual inspection of the Cylinder 5 fuel injector's electrical connector and the wiring harness for any damage or corrosion.
Step 2: If the visual inspection doesn't reveal an obvious issue, use a multimeter to test the resistance of the Cylinder 5 fuel injector. Compare it to the manufacturer's specifications and the resistance of other injectors.
Step 3: If the injector resistance is out of spec, replace the Cylinder 5 fuel injector. If resistance is good, use a noid light to confirm the injector is receiving a proper pulse signal from the ECM. If no pulse, further electrical diagnosis is needed.