Curing Haldex EBS EB+ Gen3 Pressure Sensor & Air Leak Faults

If you regularly service trailers equipped with Haldex EBS EB+ Gen3 brake systems, you may have encountered frustrating issues such as air leaks, pressure faults, or vague fault codes that keep returning. In many cases, these problems are misdiagnosed as external wiring faults. However, they often stem from internal failures within the ECU itself.

At ECU Fix, we provide a reliable and cost-effective repair service that targets the root causes—restoring proper functionality without unnecessary replacements or vehicle downtime.

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🔧 Common Haldex EBS EB+ Gen3 Fault Codes We Repair

These brake systems frequently fail with pressure sensor-related fault codes, including:

• Service line pressure transducer open circuit
• Modulator 21 delivery pressure transducer open circuit
• Reservoir pressure sensor open circuit
• Suspension pressure sensor open circuit

Although these errors may appear to be related to sensor wiring, they are typically caused by internal faults within the ECU, such as failed components or signal loss inside the circuit board. As a result, replacing external wiring often fails to resolve the problem.

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⚠️ What’s Really Causing These Faults in the Haldex EB+ Gen3?

While wiring issues are sometimes blamed, in most cases, these pressure sensor faults arise from inside the ECU itself. Specifically, the following issues are common:

• Degraded or failed internal pressure sensors
• Micro air leaks from internal seals
• Moisture ingress that affects pneumatic or electronic sections
• General wear due to age and operating environment

Because the pressure sensors are integrated into the control unit, you can’t replace them externally. Consequently, most operators are told they need a complete new unit—which we can often avoid.

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🧰 Why Internal Air Leaks Make Things Worse

In addition to electronic faults, Gen3 Haldex EBS units are prone to developing air leaks inside the module. These leaks, although sometimes subtle, can cause inconsistent pressure readings that confuse the system. As a result, the ECU stores multiple transducer faults at once—even if only one sensor is truly failing.

Moreover, these leaks are usually not serviceable externally. Therefore, the only way to eliminate the root cause is through disassembly, resealing, and proper internal repair.

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🛠 How ECU Fix Repairs Haldex EB+ Gen3 EBS Units

At ECU Fix, we use a structured, proven approach to fully test and repair EB+ Gen3 modules. This ensures that both pressure sensor faults and internal leaks are corrected—permanently.

Here’s what’s included in our process:

• ✅ In-depth bench testing and fault code confirmation
• ✅ Disassembly and cleaning of pneumatic chambers
• ✅ Component-level repair of pressure transducers and circuits
• ✅ Replacement of any failed seals and resealing of the module
• ✅ Simulated system testing to confirm pressure response accuracy
• ✅ Final quality control and full lifetime warranty included

Instead of masking the issue, we resolve it—ensuring lasting reliability.

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🚚 Collection and Return, Handled with Care

You can either post your unit directly or choose courier collection at checkout. Whichever you prefer, we’ll ensure secure handling and fast turnaround to minimise vehicle downtime.

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🔢 Common Haldex EBS EB+ Gen3 Part Numbers We Repair

We regularly repair a wide range of Haldex Gen3 EBS modules. If your unit has one of the part numbers below—or a similar variation—it’s likely supported.

📌 Note:
This is not a complete list. If your part number is slightly different, just contact us—we can quickly confirm if it’s repairable.

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⚙️ Why Choose ECU Fix For Your Haldex EB+ Gen3?

There are several reasons why operators trust us with their braking systems:

• We’re a specialist ECU repair company, not just a general electronics lab
• Every repair comes with a lifetime warranty—for complete confidence
• We offer a 24–48 hour turnaround on most EBS repairs
• UK-wide courier collection is available at checkout
• If we can’t repair your unit, you only pay for collection & return shipping—no fix, no fee

Moreover, we’re easy to reach and fast to respond—so you’re never left waiting.

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📦 How to Book a Repair

1. Click “Shop Now” on this page to book the EBS module repair
2. Choose courier collection or send the unit directly
3. We’ll test, repair, and return the unit—fully restored and ready to refit
4. Simply clear fault codes, reconnect, and return the trailer to service