Engine ECUs

Bench test and written repair quote: £45 per module (£80 for the JLR 48V DC/DC converter). The fee is deducted from the repair if you approve it. If you decline, no fault is found or the unit cannot be repaired, you pay only the test fee and we return the unit with the report – tracked UK return is included. No repair starts without your approval. See how it works.

Common symptoms of faulty engine ECUs

• No start, no crank signal or immobiliser not releasing
• Engine warning light with control module codes
• No communication with the ECU
• Intermittent cut-out, misfire or limp mode that persists after component checks

Fault codes that point to the engine ECU itself

Generic OBD-II codes, used by all makes (VW, Audi, BMW, Mercedes, Ford, Land Rover and others). They suggest an internal ECU fault rather than a sensor or wiring problem.

Codes vary by manufacturer. Send us your full fault code readout with the part number.

Possible causes

• Water ingress or corrosion
• Failed internal driver or power supply
• Damage after jump starting or welding
• Corrupted software or failed flash

How we check it

Not every engine fault is the ECU. We confirm the fault on the bench before quoting a repair. Each unit is assessed individually; any repair starts only after you approve the quotation. Repair prices are quoted individually after the agreed assessment.

Send your unit

Request a quote with your vehicle registration, part number and fault codes. Start a repair request →