Honda Jazz ECU P0203 P0204 Injector Circuit Fault — Repair Specialist | The Vehicle Check
Fault codes P0203 and P0204 on the Honda Jazz indicate injector circuit faults on cylinders 3 and 4. As with P0201 and P0202, these codes frequently originate from failed injector driver circuits inside the ECU rather than faulty injectors. The Vehicle Check repairs Honda Jazz ECU injector driver faults on all four cylinders at component level. We return your original ECU repaired, coded and ready to refit with no additional programming required.
P0203 and P0204 on the Honda Jazz
When P0203 and P0204 appear together, the fault may be in a shared driver stage that serves both cylinders 3 and 4, or there may be two independent driver failures. Our bench test distinguishes between these possibilities by monitoring each driver output individually.
Symptoms typically include rough running on all four cylinders (when both are affected), high fuel consumption, misfires under load and an engine management light. In severe cases the engine may run on just two cylinders, producing very noticeable vibration.
ECU Bench Test and Repair
We monitor all four injector driver outputs simultaneously during the bench test. Where P0203 and P0204 are both present we identify whether this is a shared fault or two independent failures and repair accordingly. All four channels are verified after repair before return.
Your original ECU's vehicle coding and immobiliser data is fully preserved — no dealer programming is required on refitting.
Nationwide Mail-In
Post your Honda Jazz ECU to The Vehicle Check, Enfield EN3 7PH. We return it repaired in 2 to 3 working days. Call 0203 489 2610.
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The Vehicle Check | Unit 8 Solway Business Centre | Tysoe Street | Enfield | EN3 7PH
📞 0203 489 2610 | 📧 info@thevehiclecheck.co.uk
Nationwide mail-in postal service. All work covered by our repair warranty.