What Is Car Fault Code P1407? Diagnose & Clear It with iCarsoft CR Pro S
If your check engine light illuminates and your diagnostic tool pulls up P1407, you’re facing an issue with your vehicle’s Exhaust Gas Recirculation (EGR) system—specifically the EGR pintle position sensor. This sensor monitors the movement of the EGR valve’s pintle (a small valve that regulates exhaust gas flow), ensuring optimal engine performance, fuel efficiency, and emissions control. Ignoring P1407 can lead to rough idling, reduced power, increased emissions, or even engine hesitation. In this guide, we’ll break down what P1407 means, why it occurs, and how the iCarsoft CR Pro S—your all-in-one diagnostic solution—can help you pinpoint and resolve the problem efficiently.
iCarsoft CR Pro S testing EGR pintle sensor to diagnose P1407 fault code
What Exactly Is Fault Code P1407?
P1407 is a manufacturer-specific OBD-II trouble code, most commonly defined as “EGR Pintle Position Sensor Circuit High Input” (varies slightly by make, but core focus is EGR pintle sensor malfunction). The EGR pintle position sensor sends real-time data to the ECU (Engine Control Unit) about the EGR valve’s opening and closing status. When the ECU detects an abnormally high electrical signal (or no valid signal) from the sensor, it triggers P1407, indicating a communication failure or sensor malfunction.
This code is prevalent in gasoline and diesel vehicles with EGR systems, as the pintle sensor is a critical component for regulating exhaust gas recirculation. Left unaddressed, it can cause the EGR system to default to a safe mode, compromising performance and efficiency.
Why Does P1407 Happen? Common Causes
P1407 typically stems from issues with the EGR pintle position sensor, EGR valve, or related components:
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Faulty EGR Pintle Position Sensor: The sensor may be worn out, contaminated with carbon buildup, or electrically defective.
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Carbon Buildup on EGR Valve/Pintle: Deposits can prevent the pintle from moving freely, damaging the sensor or skewing its readings.
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Wiring/Connector Issues: Damaged, frayed, or shorted wires, or a loose/corroded connector between the sensor and ECU.
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Failed EGR Valve: A stuck or malfunctioning EGR valve can put excessive stress on the pintle sensor.
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Low Battery Voltage: A weak battery can cause unstable electrical signals to the sensor.
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ECU Malfunction: Rarely, the engine control unit may fail to interpret the sensor’s signal correctly.
Why the iCarsoft CR Pro S Is Ideal for P1407
When it comes to diagnosing and fixing P1407, the iCarsoft CR Pro S outperforms basic scanners by offering deep EGR system insights and global compatibility. Here’s why it’s your best tool:
Full EGR System Scans
Unlike basic scanners that only read the code, the CR Pro S dives into the EGR system, checking the pintle position sensor, EGR valve, and related wiring.
Live Data Monitoring
View real-time EGR pintle sensor voltage and valve position to verify if the signal is abnormally high.
Bi-Directional Control
Test the EGR valve and sensor by sending commands—confirm if the pintle moves freely and the sensor responds correctly (no guesswork about component failure).
Global Vehicle Support
Works with over 60 makes (Ford, Toyota, BMW, Honda, Mercedes-Benz, etc.)—P1407 is no match for its wide compatibility with EGR-equipped vehicles.
One-Click Code Clear
After fixing the issue, erase P1407 and turn off the check engine light in seconds.
Lifetime Free Updates
Stay compatible with new EGR system designs and code definitions.
Feedback Function
Get customized repair suggestions from certified professionals tailored to your car’s make and model.
How to Diagnose & Fix P1407 with the CR Pro S (Step-by-Step)
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1. Connect the CR Pro S
Plug the tool into your car’s OBD-II port (under the dashboard) and turn on the ignition.
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2. AutoVIN Identify
The tool automatically detects your vehicle’s details—no manual entry needed.
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3. Scan for Codes
Select “Full System Scan” or “Engine System Scan” to retrieve P1407 and related codes (e.g., P0401 for EGR flow issues, P1406 for low input).
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4. Check Live Data
Monitor EGR pintle sensor voltage—abnormally high readings confirm a sensor or wiring problem.
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5. Test Components
Use bi-directional control to activate the EGR valve—if the pintle doesn’t move, the valve is stuck; if it moves but the sensor shows no change, the sensor is faulty.
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6. Fix the Root Cause
Replace the pintle sensor, clean the EGR valve/pintle, repair wiring, or address carbon buildup (based on your findings).
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7. Clear the Code
Use the “Erase Codes” function to reset P1407 and the check engine light.
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8. Re-Scan & Verify
Run a follow-up scan after driving to ensure the code doesn’t return—confirm the EGR system is working properly.
FAQs About P1407 & the iCarsoft CR Pro S
Q: Can I drive with P1407?
A: You can drive short distances, but long-term use may cause reduced fuel efficiency, power loss, or failed emissions tests. Diagnose it promptly with the CR Pro S.
Q: Will the CR Pro S work with my car to diagnose P1407?
A: Yes! The CR Pro S supports over 60 global makes and all 1996+ OBD-II compliant vehicles with EGR systems—whether gasoline or diesel.
Q: Do I need mechanical experience to use the CR Pro S for P1407?
A: No! The tool’s 5-inch touchscreen, AutoVIN function, and clear instructions make it user-friendly for beginners. It even highlights EGR system components for easy reference.
Q: Can the CR Pro S distinguish between a faulty sensor and EGR valve?
A: Absolutely. Bi-directional control tests the EGR valve’s movement—if the valve works but the sensor shows high input, the sensor is faulty; if the valve is stuck, it needs cleaning or replacement.
Q: After fixing P1407, will the CR Pro S clear the code permanently?
A: Yes—once the root cause (e.g., faulty sensor, carbon buildup) is addressed, the “Erase Codes” function clears P1407 permanently. If it returns, the issue wasn’t fully resolved.
Q: Is the CR Pro S better than a basic scanner for P1407?
A: Basic scanners only show P1407—they can’t monitor sensor voltage or test the EGR valve. The CR Pro S identifies why the code occurred, saving you from unnecessary part replacements.
Q: Does the CR Pro S support diesel vehicles with P1407?
A: Yes! Diesel engines rely heavily on EGR systems, and the CR Pro S includes specialized diesel EGR diagnostic functions to handle P1407.
Q: How often should I update the CR Pro S for P1407 diagnostics?
A: The CR Pro S offers lifetime free Wi-Fi updates—update every 3–6 months to ensure compatibility with new EGR technologies and code definitions.
Final Thoughts: Don’t Let P1407 Compromise Your Engine’s Performance
Fault code P1407 may seem complex, but with the iCarsoft CR Pro S, you can diagnose and fix it from your garage—no expensive dealership visits required. Its deep EGR system coverage, live data monitoring, and bi-directional control take the guesswork out of repairs, whether you’re a DIY enthusiast or professional mechanic.
Invest in the iCarsoft CR Pro S today to tackle P1407 and hundreds of other engine-related codes—keep your car running efficiently, cleanly, and reliably.
