Honda Jazz Engine Management Light

[Kdelph]

My 2006 Honda jazz engine management light has come on and sometimes is lacking power when accelerating in 2nd and 3rd gear at around 3000 revs

[Buenchico]

There's some possibly relevant discussion (mentioning the costs of fixing problems here):
https://clubjazz.org/forum/index.php?topic=10695.0

See also here:
https://clubjazz.org/forum/index.php?topic=1761.0
(I note that the words 'throttle body' seem to keep turning up on relevant threads. If that's the problem, the last post on that link will give you an idea of the cost of fixing it).

However anything anyone here posts will involve an element of guesswork. You really need to get the system checked by computer, in order to identify the fault. (There's one thing always to check first when an engine management light comes on. That's to ensure that the fuel filler cap is tightly in position!)

[bhg481]

As Chris says, the diagnostic computer is the only answer. The ignition system on modern cars is completely computer controlled and there will be a diagnostic code in your car's system which will tell you where the problem is.

[Hymie]

Anyone who owns a car manufactured this century should carry one of these in the boot/glove box – a single use will more than save what a garage will rush you for a diagnostic test.
Other similar (cheaper/more expensive) models are available.

https://www.ebay.co.uk/itm/124491510761?hash=item1cfc45b3e9:g:hfMAAOSwAmBf2EmV

[Khandro]

Hymie; having found the fault (one hopes) with this gadget, can one repair it?
The last Jazz (automatic) I had before the present one was a curse. It had an intermittent fault which only sometimes happened when you put your foot down as in overtaking or powering around a bend it hesitated, making a terrible feeling of uncertainty. A holiday in Provence was largely ruined by this.
Honda tried everything, the diagnosis produced nothing and after many parts were exchanged even THEY could not find where the fault lay. They told me the car would be scrapped as they couldn't let it go out further like this, and I took a new (used) Jazz which is 100% OK.

[bhg481]

Intermittent problems are always difficult to diagnose as you've got to catch them misbehaving at the time you do the diagnostics. It's one of the few things I have sympathy for garages; they are on a hiding to nothing spending time and changing bits and expecting payment even when the fault recurs.

[Khandro]

bhg; I think they were beginning to think I was the problem! Fortunately I took the Honda boss out for a drive after nothing for several minutes & I was beginning to despair it happened & he understood.
It didn't put me off Hondas though; I've had many; Civics, CRVs all good cars, just this one pesky fault.

[davebro]

Had few such problems - a Vectra that would cut out at speed, left me stuck on the *central reservation* of the M6! A faulty sensor I think. And the mass air flow meter on an Audi A4. Worst was a VW Golf plus, if it DIDN'T show a warning light I assumed something was wrong!

Currently 2011 Toyota RAV4 - had it 3 years, not a single fault, don't even know if it HAS warning lights!

[Hymie]

I’ll admit that the ebay item (and similar) listed in my post above might not detect/display certain non-generic fault codes – but I have used it to good effect, identifying whether the engine warning light illumination is due to a potentially serious issue, or one that can wait a while.

Most of these OBD scanners will display vehicle stored codes and allow the fault code to be erased – if it returns, it is a fair bet that it is a genuine fault.

Interestingly where I have replaced the identified faulty component/sensor – the engine warning light remains on until cleared by the OBD device.