Fix P0724: Output Speed Sensor Circuit Intermittent – Trust iCarsoft CR Eagle
If your check engine light turns on and you experience erratic shifting, transmission slippage, or reduced power, your diagnostic tool may retrieve P0724. This trouble code points to a critical issue with your vehicle’s Output Speed Sensor (OSS)—specifically an “Output Speed Sensor Circuit Intermittent” malfunction. The OSS provides real-time transmission speed data to the Engine Control Unit (ECU) and Transmission Control Module (TCM), and intermittent signals disrupt smooth gear changes. Ignoring P0724 can lead to transmission damage, poor fuel efficiency, and unsafe driving conditions. In this guide, we’ll break down P0724, its causes, and how the iCarsoft CR Eagle—an OE-level diagnostic tool—helps you resolve it efficiently.
What Exactly Is Fault Code P0724?
P0724 is a generic OBD-II trouble code defined as “Output Speed Sensor (OSS) Circuit Intermittent”. Key details to understand:
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The OSS (also called the transmission speed sensor) is mounted on the transmission, sending voltage or frequency signals to the ECU/TCM based on the output shaft’s rotation.
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An “intermittent” circuit means the sensor’s signal randomly cuts out, spikes, or drops—rather than staying consistently abnormal.
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This inconsistency indicates a loose connection, damaged wiring, or failing sensor that only malfunctions under specific conditions (e.g., vibration, temperature changes).
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P0724 applies to 1996+ OBD-II compliant vehicles with automatic transmissions, including popular makes like Ford, Toyota, Honda, BMW, Mercedes-Benz, and VW.
Why Does P0724 Happen? Common Causes
Loose or Corroded Connectors
Dirt, moisture, or wear causes intermittent contact between the sensor and wiring harness.
Damaged Wiring
Frayed, cracked, or shorted wires (often from vibration or heat) disrupt signal transmission randomly.
Failing Output Speed Sensor
Internal electrical components wear out, leading to intermittent signal loss.
Sensor Mounting Issues
A loose or broken sensor mount causes the sensor to shift, resulting in inconsistent readings.
Transmission Fluid Problems
Low, dirty, or contaminated fluid affects sensor operation and internal transmission components.
ECU/TCM Malfunction & Mechanical Transmission Wear
Rarely, a faulty control module misinterprets signals; worn gears/bearings create irregular shaft rotation causing intermittent data.
Symptoms of P0724
P0724 often presents inconsistent but noticeable symptoms, including:
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Illuminated check engine light (primary indicator).
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Erratic or delayed transmission shifting (worse under acceleration or vibration).
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Transmission slipping or failing to engage gears properly.
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Reduced engine power or “limp mode” (to protect transmission components).
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Inaccurate speedometer reading (in some vehicles).
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Increased fuel consumption due to improper gear ratios.
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Intermittent engine stalling or hesitation during acceleration.
Why the iCarsoft CR Eagle Is Perfect for P0724
Basic scanners only read P0724, but the iCarsoft CR Eagle offers advanced features that simplify diagnosing intermittent issues. Here’s why it stands out:
Full Transmission System Scans
Dives deep into the OSS, wiring, connectors, and ECU/TCM to pinpoint intermittent signal sources.
Live Data Monitoring
Captures real-time OSS signal fluctuations—catches intermittent drops or spikes that basic scanners miss.
Powerful Bi-directional Control
Sends commands to test the OSS circuit under different conditions—verifies if the sensor and wiring respond consistently.
Global Vehicle Coverage
Works with 58 major vehicle makes, including gasoline/diesel models and OBDI vehicles (with included adaptors like Benz38Pin and BMW20Pin).
Advanced Hardware
Features a 10.1-inch touchscreen, 4GB RAM + 128GB ROM, and dual-band Wi-Fi/Bluetooth for smooth wireless diagnostics.
ECU/TCM Coding & Adaptation
Reconfigures control modules after sensor/wiring repair to restore proper transmission calibration.
Bonus Features
Built-in TPMS programming (with 4 sensors) and a videoscope to inspect wiring, connectors, and the OSS for damage.
Lifetime Free Updates & Support
Stays compatible with new transmission systems and provides expert technical support.
How to Diagnose & Fix P0724 with the iCarsoft CR Eagle (Step-by-Step)
Step 1: Connect the Tool
Plug the CR Eagle’s OBD-II cable into your vehicle’s port (under the dashboard). Use included OBDI adaptors for older models.
Step 2: AutoVIN Identification
The tool automatically retrieves your vehicle’s make, model, and VIN—no manual entry needed.
Step 3: Scan for Codes
Select “Full System Scan” or “Transmission System Scan” to pull up P0724 and related codes (e.g., P0720 for OSS circuit malfunction).
Step 4: Check Live Data
Navigate to “Live Data” to monitor OSS signal. Drive to replicate symptoms—intermittent drops/spikes confirm the P0724 issue.
Step 5: Run Bi-directional Tests
Use the “Active Test” function to simulate sensor signals and test transmission response. Inconsistent results point to wiring or sensor issues.
Step 6: Inspect Components
Use the CR Eagle’s videoscope to check wiring for fraying and connectors for corrosion. Verify the sensor is securely mounted.
Step 7: Repair or Replace Parts
Clean/replace corroded connectors, repair damaged wiring, or replace the failing OSS. Service transmission fluid if needed.
Step 8: Clear the Code & Verify
Use the CR Eagle to erase P0724, test drive under various conditions, and re-scan to ensure the code doesn’t return.
FAQs: Your P0724 Questions Answered
Can I drive with P0724?
You can drive short distances, but intermittent shifting increases accident risk. Diagnose with the CR Eagle promptly—avoid highway driving or heavy loads.
Will the CR Eagle work with my car?
Yes! It supports 58 major vehicle makes and all 1996+ OBD-II compliant vehicles with automatic transmissions. It also works with OBDI models using included adaptors.
Do I need mechanical experience to use the CR Eagle?
No! Its 10.1-inch touchscreen, AutoVIN function, and clear prompts make it user-friendly for DIYers. Lifetime technical support is available if you need help.
Can the CR Eagle detect intermittent wiring issues?
Absolutely. Live data monitoring captures random signal drops, and bi-directional tests verify if wiring connections are inconsistent.
Do I need to replace the sensor, or can I repair the issue?
The CR Eagle’s tests help you decide—loose connectors/wiring can be repaired; intermittent signal from a secure sensor means replacement is needed.
Is the CR Eagle better than a basic scanner for P0724?
Yes. Basic scanners only read the code, but the CR Eagle captures intermittent signals and tests circuits—saving you from guesswork and unnecessary sensor replacements.
How often should I update the CR Eagle?
Update every 3–6 months via free Wi-Fi updates to ensure compatibility with new transmission systems and diagnostic algorithms.
Does the CR Eagle come with everything I need?
Yes! It includes an OBD-II cable, 4 OBDI adaptors, 4 TPMS sensors, a videoscope, and a carrying case—no extra tools required for P0724 diagnosis.
Final Thoughts: Don’t Let Intermittent P0724 Damage Your Transmission
P0724 is a warning that your OSS circuit has intermittent issues, putting your transmission and safety at risk. The iCarsoft CR Eagle isn’t just a tool for fixing P0724—it’s a comprehensive diagnostic solution that handles over 40 high-level service functions, making it a long-term investment for all your vehicle maintenance needs. Whether you’re a DIY enthusiast or a professional, the CR Eagle gives you the power to diagnose and fix P0724 right from your garage.
Invest in the iCarsoft CR Eagle today to tackle P0724 and hundreds of other codes—keep your transmission shifting smoothly and your vehicle reliable.
