Fix P0473: Exhaust Pressure Sensor Circuit High Input With iCarsoft CR MAX BT
If your diesel or turbocharged vehicle loses power, triggers the check engine light, or fails emissions tests with OBD2 code P0473, you’re dealing with a critical exhaust system issue. P0473 signals “Exhaust Pressure Sensor (EPS) Circuit High Input”—a fault where the sensor sends abnormally high voltage signals to the Engine Control Unit (ECU). Ignore it, and you’ll face reduced performance, increased fuel consumption, or even turbocharger damage.
But diagnosing P0473 doesn’t have to mean costly dealership visits. In this guide, we’ll break down P0473 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 P0473 at home. Let’s get your exhaust system back in sync!
What Is OBD2 Code P0473?
P0473 is a standard OBD2 diagnostic trouble code defined as “Exhaust Pressure Sensor (EPS) Circuit High Input”. The exhaust pressure sensor monitors exhaust gas pressure in the turbocharger or exhaust manifold, sending real-time data to the ECU. This data regulates turbo boost, EGR (Exhaust Gas Recirculation) operation, and emissions control—critical for engine efficiency.
When the ECU detects voltage from the EPS circuit exceeding normal limits (usually above 4.5V), it triggers P0473. This typically points to a faulty sensor, damaged wiring, exhaust leaks, or sensor clogging—all issues that demand prompt attention to protect your engine and emissions compliance.
Top 5 Causes of P0473
1. Faulty Exhaust Pressure Sensor (EPS)
The #1 culprit—sensors degrade from heat, exhaust debris, or electrical wear, sending false high-voltage signals.
2. Damaged Wiring/Connectors
Corrosion, fraying, or short circuits between the sensor and ECU cause voltage spikes.
3. Exhaust Leaks
Leaks before the sensor let air into the exhaust, skewing pressure readings and triggering high-input errors.
4. Clogged Sensor Ports
Soot, carbon, or debris block the sensor’s pressure ports, forcing it to send abnormal signals.
5. ECU Malfunction
Rare, but outdated firmware or a faulty ECU may misinterpret sensor data, triggering false P0473 codes.
Common Symptoms of P0473
Don’t ignore these warning signs—they mean P0473 is affecting your vehicle:
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Illuminated check engine light (MIL) or exhaust system warning light.
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Reduced engine power and turbo lag (delayed boost response).
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Increased fuel consumption (the engine compensates for incorrect pressure data).
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Failed emissions tests (critical for road legality in most regions).
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Rough idling or hesitation during acceleration (especially in diesel vehicles).
Why the iCarsoft CR MAX BT Is Your Best Tool for P0473
Basic OBD scanners can read P0473, but they can’t access exhaust system-specific data or test sensor functionality. The iCarsoft CR MAX BT—equipped with Bluetooth connectivity and advanced exhaust diagnostics—gives you professional-grade tools to pinpoint and fix P0473 wirelessly (via your smartphone/tablet).
Key Features That Simplify P0473 Troubleshooting:
Exhaust System Specialization
Reads P0473 and detailed subcodes (e.g., “EPS Circuit High 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 EPS voltage, exhaust pressure, and ECU communication to confirm sensor or wiring issues.
Bidirectional Control
Tests the exhaust pressure sensor by sending commands to verify responsiveness—avoids unnecessary sensor replacement.
Multi-Brand Compatibility
Works with 60+ global brands (Ford, Volkswagen, BMW, Mercedes-Benz, Toyota, Subaru, 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 diesel/turbo models and updated diagnostic protocols.
Pro Tip: The CR MAX BT’s wireless live data lets you monitor exhaust pressure while test-driving—critical for verifying fixes in real-world conditions.
Shop the iCarsoft CR MAX BT Now →
Real Customer Reviews: How the CR MAX BT Fixed P0473
“I got P0473 on my 2018 Ford F-250 diesel and was quoted $450 by the dealership (sensor + labor). Bought the iCarsoft CR MAX BT, paired it with my phone, and scanned in 60 seconds—found a faulty exhaust pressure sensor. Replaced it for $70 and used the tool to clear the code + monitor pressure. My truck’s power is back, and I saved over $380! Bluetooth makes it so easy to use under the hood.”
— Ryan T., Diesel Truck Owner
“As a mobile mechanic, I need a portable scanner for exhaust issues. The CR MAX BT has fixed P0473 on VW TDI, BMW X5, and Mercedes Sprinter models. The bidirectional sensor 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!”
— Sophie L., Independent Mechanic
“I’m not mechanically savvy, but the CR MAX BT made P0473 simple. Paired it with my Android phone, followed the prompts, and found a frayed wire in the EPS circuit. Fixed it with $15 of electrical tape and cleared the code—my 2020 Toyota Hilux diesel no longer hesitates. Avoided a $800 shop bill. The Bluetooth feature means I don’t have to hunch over the OBD port—total win!”
— James K., Daily Commuter
8 FAQs About P0473 & the iCarsoft CR MAX BT
1. Can I Drive With P0473?
Short trips (under 10 miles) are safe, but long drives risk turbo damage or emissions failures. Avoid high RPMs and fix the issue promptly.
2. How Much Does It Cost to Fix P0473?
Cost varies: An exhaust pressure sensor costs $50–$200 (parts); wiring repairs cost $10–$50; dealership repairs cost $300–$1,000+. 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 diesel (Ford, VW, Toyota) and turbo (Subaru, Audi, BMW) models. Check the official compatibility list for your make/model/year.
4. How Do I Use the CR MAX BT to Diagnose P0473?
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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 P0473 and a description.
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Go to “Live Data” to monitor EPS voltage—readings above 4.5V confirm the issue.
5. Can the CR MAX BT Clear P0473 Permanently?
Yes! After fixing the root cause (e.g., replacing the sensor), select “Clear DTCs” in the app. Test drive to confirm no reoccurrence—use live data to verify normal exhaust pressure.
6. Do I Need Mechanical Experience to Use the CR MAX BT?
No—its user-friendly app, AutoVIN, and step-by-step prompts make it beginner-friendly. Multilingual support (15 languages) adds convenience.
7. What If P0473 Comes Back After Clearing It?
If the code returns, the root cause (e.g., hidden exhaust leaks 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 Exhaust-Related Functions?
Yes—beyond P0473, it can monitor turbo boost pressure, test EGR systems, and diagnose related codes like P0470 (EPS Circuit Malfunction) or P0471 (EPS Circuit Low Input).
Final Thoughts: Don’t Let P0473 Ruin Your Vehicle’s Performance
OBD2 code P0473 is a fixable issue—with the right tool. The iCarsoft CR MAX BT combines wireless Bluetooth convenience with professional-grade exhaust system diagnostics, letting you troubleshoot and fix P0473 at home without dealership markups.
Whether you’re a diesel owner, turbo enthusiast, or mechanic, the CR MAX BT’s durability, multi-brand coverage, and lifetime updates make it a long-term investment. Fix P0473, restore engine efficiency, and stay emissions-compliant—all with one wireless tool.
Ready to tackle P0473 head-on? Click below to get the iCarsoft CR MAX BT and unlock seamless, cable-free exhaust diagnostics!
Buy iCarsoft CR MAX BT Today →
Have questions about P0473 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.
