Mazda 3 woes - 2020

m0bov

Try some red line fuel system cleaner. Wait until tank is empty, add it, the full up with v power. Then when driving, keep revis above 3k. Clear code and see also suggest a new battery as well.

Vitor

I’d spend £15-£20 on a decent injector cleaner and have the battery/charging system properly tested before spending £1,500.

Your printout shows the injector/lean faults as past faults, while low battery voltage and lost communication with the engine ECU are current. If that’s still the original six-year-old battery and it tests weak, I’d replace it, clear the codes, run a tank with injector cleaner and then rescan.

If P1200/P0171 actually return after that, then investigate the injectors properly. I certainly wouldn’t jump straight to £1,500 worth of “injector cleaning” without seeing the test results and exactly what the dealer proposes to do.

Gaz012012

Thank you. The dealer didnt even mention or have any plan for the battery.....…

Booked in somewhere tomorrow - really interested what they say