Fix P0264: Cylinder 1 Injector Circuit Low Input With iCarsoft CR MAX BT
If your vehicle sputters, loses power, or the check engine light illuminates with OBD2 code P0264, you’re dealing with a critical fuel injector issue. P0264 signals “Cylinder 1 Injector Circuit Low Input”—a fault where the fuel injector for Cylinder 1 receives insufficient voltage from the Engine Control Unit (ECU). Ignore it, and you’ll face rough idling, reduced fuel efficiency, or even engine misfires that damage pistons or valves.
But diagnosing P0264 doesn’t have to mean costly dealership visits. In this guide, we’ll break down P0264 in plain English: what it is, common causes, red-flag symptoms, and how the iCarsoft CR MAX BT diagnostic tool (with wireless Bluetooth) simplifies troubleshooting for DIYers and mechanics. Plus, we’ll share real customer reviews, 8 FAQs, and show you how to fix P0264 at home. Let’s get your fuel system back in peak condition!
What Is OBD2 Code P0264?
P0264 is a standard OBD2 diagnostic trouble code defined as “Cylinder 1 Fuel Injector Circuit Low Input”. Fuel injectors deliver precise amounts of fuel into the engine’s cylinders for combustion—controlled by voltage signals from the ECU. For Cylinder 1, the ECU expects a specific voltage range (typically 10–14V) to activate the injector.
When the ECU detects voltage below this range (or no voltage at all) in Cylinder 1’s injector circuit, it triggers P0264. This usually points to a faulty injector, damaged wiring, loose connections, or ECU issues—all problems that demand prompt attention to avoid engine damage and poor performance.
Top 5 Causes of P0264
1. Faulty Cylinder 1 Fuel Injector
The #1 culprit—injectors wear out from age, clogging, or internal electrical failure, failing to respond to ECU signals.
2. Damaged Wiring/Connectors
Corrosion, fraying, or short circuits between the injector and ECU reduce voltage flow.
3. Loose/Bad Electrical Connections
Poor contact at the injector connector or ECU plug disrupts signal transmission.
4. Clogged Injector Nozzle
Debris or carbon buildup blocks fuel flow, forcing the injector to draw more current (lowering voltage).
5. ECU Malfunction
Rare, but outdated firmware or a faulty ECU may send insufficient voltage to the injector circuit.
Common Symptoms of P0264
Don’t ignore these warning signs—they mean P0264 is affecting your engine:
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Illuminated check engine light (MIL) or fuel system warning light.
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Rough idling or engine shaking (especially at startup).
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Reduced engine power and hesitation during acceleration.
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Increased fuel consumption (uneven fuel distribution).
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Engine misfires (Cylinder 1 isn’t receiving enough fuel, leading to incomplete combustion).
Why the iCarsoft CR MAX BT Is Your Best Tool for P0264
Basic OBD scanners can read P0264, but they can’t test injector functionality or verify circuit voltage. The iCarsoft CR MAX BT—equipped with Bluetooth connectivity and advanced fuel system diagnostics—gives you professional-grade tools to pinpoint and fix P0264 wirelessly (via your smartphone/tablet).
Key Features That Simplify P0264 Troubleshooting:
Fuel Injector Specialization
Reads P0264 and detailed subcodes (e.g., “Cylinder 1 Injector Circuit Low Voltage”) to pinpoint the root cause.
Bluetooth Wireless Connectivity
Syncs with iOS/Android devices for cable-free operation—perfect for tight engine bays or test-driving.
Live Data Streaming
Monitors real-time injector voltage, fuel pressure, and ECU communication to confirm injector or wiring issues.
Bidirectional Control
Tests Cylinder 1’s injector by sending activation commands—critical for ruling out injector failure vs. wiring problems.
Multi-Brand Compatibility
Works with 60+ global brands (Ford, Toyota, Honda, BMW, Mercedes-Benz, Volkswagen, and more).
Intuitive Mobile App
Step-by-step prompts, AutoVIN identification, and multilingual support (15 languages) make it beginner-friendly.
Lifetime Free Updates
Stays compatible with new vehicle models and updated fuel system technology.
Pro Tip: The CR MAX BT’s bidirectional test lets you activate the injector manually—no need to disassemble parts to confirm if it’s faulty.
Shop the iCarsoft CR MAX BT Now →
Real Customer Reviews: How the CR MAX BT Fixed P0264
“I got P0264 on my 2017 Honda Civic and was quoted $500 by the dealership (injector replacement + labor). Bought the iCarsoft CR MAX BT, paired it with my iPhone, and scanned in 1 minute—found a faulty Cylinder 1 injector. Replaced it for $80 and used the tool to clear the code + test the new injector. My Civic runs smoother than ever, and I saved over $400! Bluetooth makes it so easy to use under the hood.”
— Emily M., DIY Car Owner
“As a small garage mechanic, I need a portable scanner for fuel system issues. The CR MAX BT has fixed P0264 on Toyota Corollas, BMW 3 Series, and Ford F-150s. The bidirectional injector test is a game-changer—lets me confirm failures without guesswork. Wireless sync is seamless, and the app’s live data is crystal clear. Worth every penny for professionals and DIYers alike!”
— Michael R., Independent Mechanic
“I’m not mechanically savvy, but the CR MAX BT made P0264 simple. Paired it with my Android phone, followed the on-screen prompts, and found a loose connector on the Cylinder 1 injector. Fixed it for free and cleared the code—my 2019 Hyundai Elantra no longer hesitates. Avoided a $700 shop bill. The Bluetooth feature means I don’t have to hunch over the OBD port—total game-changer!”
— Sarah K., Daily Commuter
8 FAQs About P0264 & the iCarsoft CR MAX BT
1. Can I Drive With P0264?
Short trips (under 5 miles) are risky—engine misfires can damage pistons or catalytic converters. Avoid driving until the issue is fixed.
2. How Much Does It Cost to Fix P0264?
Cost varies: A fuel injector costs $50–$250 (parts); wiring repairs cost $10–$50; dealership repairs cost $300–$1,200+. The CR MAX BT helps you avoid overpaying.
3. Will the CR MAX BT Work With My Vehicle?
The CR MAX BT covers 60+ global brands, including Asian (Toyota, Honda, Hyundai), European (BMW, Mercedes, VW), and American (Ford, GM) models. Check the official compatibility list for your make/model/year.
4. How Do I Use the CR MAX BT to Diagnose P0264?
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Download the iCarsoft app and pair the tool with your phone via Bluetooth.
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Plug the CR MAX BT into your vehicle’s OBDII port (under the dashboard).
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Turn on the ignition (don’t start the engine) → Select “Engine System” → “Read DTCs”—the app displays P0264 and a description.
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Go to “Live Data” to monitor Cylinder 1 injector voltage—readings below 10V confirm the issue.
5. Can the CR MAX BT Clear P0264 Permanently?
Yes! After fixing the root cause (e.g., replacing the injector), select “Clear DTCs” in the app. Test drive to confirm no reoccurrence—use live data to verify normal injector voltage.
6. Do I Need Mechanical Experience to Use the CR MAX BT?
No—its user-friendly app, AutoVIN identification, and step-by-step prompts make it beginner-friendly. Multilingual support (15 languages) adds convenience.
7. What If P0264 Comes Back After Clearing It?
If the code returns, the root cause (e.g., hidden wiring damage or ECU issues) wasn’t fixed. Use the CR MAX BT’s bidirectional tests and live data to troubleshoot further.
8. Does the CR MAX BT Offer Other Fuel System Functions?
Yes—beyond P0264, it can test all cylinder injectors, monitor fuel pressure, and diagnose related codes like P0261 (Cylinder 1 Injector Circuit High Input) or P0267 (Cylinder 2 Injector Circuit Low Input).
Final Thoughts: Don’t Let P0264 Damage Your Engine
OBD2 code P0264 is a fixable issue—with the right tool. The iCarsoft CR MAX BT combines wireless Bluetooth convenience with professional-grade fuel system diagnostics, letting you troubleshoot and fix P0264 at home without dealership markups.
Whether you’re a casual car owner, DIY enthusiast, or mechanic, the CR MAX BT’s durability, multi-brand coverage, and lifetime updates make it a long-term investment. Fix P0264, restore engine performance, and save hundreds on repairs—all with one wireless tool.
Ready to tackle P0264 head-on? Click below to get the iCarsoft CR MAX BT and unlock seamless, cable-free fuel injector diagnostics!
Buy iCarsoft CR MAX BT Today →
Have questions about P0264 or the CR MAX BT? Drop a comment below—we’re here to help!
Disclaimer: This guide is for informational purposes only. Always consult your vehicle’s owner’s manual or a certified mechanic before major repairs. iCarsoft is not responsible for damage from improper tool use.
