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Engine management light on - P0230

Discussion about the Grand Vitara 4x4 range, including the GV1600 - 3 door, GV2000 - 5 door and XL-7 - 7 seater (1998 to 2005 models)

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Engine management light on - P0230

Postby 6R4fan » Sun Mar 07, 2010 1:09 pm

Approx 8 weeks ago the management light came on on my 02-plate Grand Vitara 2.0TD. The diagnostic machine came up with the code p0230, Fuel pump relay circuit malfunction. The garage reset the codes and said to try it. Within 24 hours the code was back.
To cut a long story short, they checked all the wiring 3 times and replaced the fuel pump relay. The car lasted 20 miles before the light came back on. After checking the wiring again (back on again) they admitted defeat and told me to take it to a diagnostics specialist.
This came up with the same code and the advice to check the wiring, relay and ECU in that order. As the rest had been checked I bit the bullet and forked out £955 on a new ECU. 40 miles later, guess what. Same code. Also in the backgroung are the codes P00CC and p00C8, although not frequent. Anyone got any other ideas?
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Re: Engine management light on - P0230

Postby alamontana » Sun Mar 07, 2010 1:22 pm

6R4fan wrote:Approx 8 weeks ago the management light came on on my 02-plate Grand Vitara 2.0TD. The diagnostic machine came up with the code p0230, Fuel pump relay circuit malfunction. The garage reset the codes and said to try it. Within 24 hours the code was back.
To cut a long story short, they checked all the wiring 3 times and replaced the fuel pump relay. The car lasted 20 miles before the light came back on. After checking the wiring again (back on again) they admitted defeat and told me to take it to a diagnostics specialist.
This came up with the same code and the advice to check the wiring, relay and ECU in that order. As the rest had been checked I bit the bullet and forked out £955 on a new ECU. 40 miles later, guess what. Same code. Also in the backgroung are the codes P00CC and p00C8, although not frequent. Anyone got any other ideas?

P0230 is the code given to a general scan tool meaning fuel pump circuit,the suzuki tool would probably have access to more involved background codes,mainly for the fuel rail pressure sensor circuit ,probably a much cheaper money saver than you have spent ,try this area before spending another fortune
like my toolbox . my stomach keeps getting larger year after year............................
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Postby craig8661 » Sun Mar 07, 2010 2:47 pm

mine had that fault code and would you belive it was the diesel filter there about £8 worth a shot as may save you loads of cash
grand vitara 2liter td 2002
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Postby Celtic 4x4 » Sun Mar 07, 2010 7:49 pm

Fuel filter required or common rail pressure sensor needs cleaning (or replacing, they're only cheap), these are the most common fuel system problems that get misdiagnosed if you don't know the zooks well.

Edit:-
Hope you kept your old ECU as you might find there was nothing wrong with it.
Once the problem is fixed, put the old ECU on and see if it's ok, if so you might be able to recoup some of your outlay.
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