📋 Learn what causes ECU communication loss on Vauxhall models

🧰 Understand how the Delco E78 fails internally

🛠 Discover our fast, tested ECU repair solution with lifetime warranty

If you’ve run diagnostics and found “Vauxhall ECU no communication”, you’re likely dealing with a common fault in the Delco E78 engine control unit. This issue affects popular Vauxhall models such as the Corsa D, Astra J, Insignia, and Meriva B.

Although wiring, fuses, and relays may check out fine, the ECU remains unresponsive. In these cases, the fault is often inside the ECU itself—not in the vehicle wiring. At ECU Fix, we specialise in repairing this no communication fault quickly, affordably, and with a lifetime warranty.

🔍 What Does “Vauxhall ECU No Communication” Actually Mean?

When your scan tool fails to connect with the engine control unit, you may see errors like:

  • “No communication with ECM”
  • “ECU not responding”
  • “No data from engine control module”

Even though power and ground are present, the ECU fails to respond. This stops the engine from starting and may trigger immobiliser faults.

⚠️ What Causes Vauxhall ECU No Communication?

While external causes like corroded pins or faulty wiring should always be checked, many Vauxhall “no comms” issues are caused by internal ECU failure—especially in the Delco E78.

Common internal issues include:

  • Failed CAN transceivers
  • Voltage regulator failure
  • Faulty circuit board components
  • Corrupted flash memory
  • Moisture damage or heat-related failure

These faults prevent the ECU from powering up or communicating over the CAN network, even when external inputs are fine.

🧪 Common Symptoms of Vauxhall ECU No Communication

If your vehicle shows any of these signs, the ECU may be at fault:

  • Scan tool can’t connect to the engine ECU
  • No check engine light on the dashboard
  • Engine won’t crank or start
  • Immobiliser light stays on or flashes
  • Other modules communicate fine
  • Fuse and wiring continuity all test OK

These symptoms point directly to a Vauxhall ECU no communication issue.

🛠 How We Repair Delco E78 ECU No Communication Faults

At ECU Fix, we provide a specialist test-and-repair service for Vauxhall ECUs that have no communication. We use dedicated bench-test equipment to simulate vehicle conditions and identify internal faults.

Our repair process includes:

  • Full bench test and power verification
  • Testing and replacement of CAN drivers and regulators
  • Component-level repair to restore functionality
  • Reprogramming or data transfer if required
  • Final testing to confirm restored communication
  • Return with a lifetime warranty

This professional solution restores the ECU—no replacement needed in most cases.

Vauxhall E78 Engine ECU Repair Service

Vauxhall E78 Engine ECU Repair Service

£210.00
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🚗 Common Vehicles and Part Numbers – Examples Include, But Are Not Limited To

We see this Delco E78 no comms fault most often in:

  • Vauxhall Corsa D – 2010–2014
  • Vauxhall Astra J – 2009–2015
  • Vauxhall Meriva B – 2010–2017
  • Vauxhall Insignia A – 2008–2017
  • Vauxhall Mokka – 2012–2016
  • Vauxhall Adam – 2013-2024
  • 12659377 / 12660714 / 12669136 / 12679097 / 12665802 / 12655499 / 12685776 / 12669322 / 12655586 / 12669749 / 12654137 / 12668991

⚙️ Why Choose ECU Fix?

  • ✅ Specialist repair of Delco E78 ECUs
  • ✅ Lifetime warranty included on all successful repairs
  • ✅ Fast 24–48 hour turnaround
  • ✅ UK-wide courier collection available
  • ✅ No fix, no fee – only pay collection & return shipping if unrepairable

We provide a tested, trusted service used by garages and trade clients nationwide.

📦 How to Book Your Vauxhall ECU No Communication Repair

  1. Click “Shop Now” on this page to start your booking
  2. Choose courier collection or send the unit directly to us
  3. We test and repair the ECU, restoring full communication
  4. Refit the ECU and confirm the engine starts and diagnostics respond
Vauxhall E78 Engine ECU Repair Service

Vauxhall E78 Engine ECU Repair Service

£210.00
Shop now

FAQs

Why is my ECU not communicating?

If your ECU isn’t communicating with diagnostic tools, it may have an internal fault—especially common in Vauxhall models using the Delco E78 ECU. Causes include failed CAN transceivers, voltage regulator faults, or corrupted software. It’s also worth checking for power, ground, and CAN wiring issues, but if those test fine, the ECU itself is likely at fault.

Why is my ECU not working?

An ECU can stop working due to electrical damage, water ingress, corrupted data, or component failure. In Vauxhalls, the Delco E78 is known to fail internally, which leads to non-start conditions and no response to diagnostics. Proper testing is needed to confirm the fault before replacing the unit.

How much is an ECU for a Vauxhall Corsa?

A brand-new ECU for a Vauxhall Corsa can cost £400–£800, not including coding and labour. However, repairing your original ECU is often far more cost-effective—typically starting from £200, with no need for reprogramming in most cases.