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Old 04-01-2017, 08:24 PM   #1 (permalink)
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Angry O sensors

Hi there,

my 2007 Swift, automatic with 1.5l engine is driving me nut!!

Not only she is boring me with the airbag lamp, but she is also having problem with O sensors.
I have changed both sensors, the #1, before catalytic converter, and # 2 after catalytic.
The malfunction light (MIL) still comes back a few kilometers after I clear DTCs.

here are the codes the ECM shows:

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Does it ring a bell to you?
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Old 04-01-2017, 08:27 PM   #2 (permalink)
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Default ECM upgrade

Hello,

my Swift is having airbag light on, and MIL on because of probably a faulty O circuit.
I have changed both sensor, but still have the MIL on.
I saw an advertising proposing to update ECM, clearing EGR, deleting O sensors, increase of performance and fuel economy.

Is it worth it?
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Old 04-01-2017, 08:38 PM   #3 (permalink)
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Ding, Ding! bell ringing...

Unfortunately, changing parts without verifying the underlying failure is prone to failure..

If you changed the O2 due to a code, you failed to verify the trigger condition, There would be several reasons for a code to trigger..

Looking at your scan data, the fuel trim is too high, again there could be several conditions which may account for this..

Check the fuel trim at idle, then again at 2000, 3000 rpm, hold at selected rpm till FT stabilizes, Best to post a graph of the results.. report back

... Philip
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Old 04-01-2017, 08:47 PM   #4 (permalink)
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Stay with one thread, shotgunning will only confuse the issue..

... Philip
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Old 04-01-2017, 09:00 PM   #5 (permalink)
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Yup, understand.
Though, I'm exploring 2 paths: should I try to solve the problem and stick with OEM Swift, or is it worth it upgrading and take the opportunity of deleting some sensors? I have no experience about reflashed ECM, and I fear bringing problems rather than solving them
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Last edited by matuva; 04-01-2017 at 09:04 PM.
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Old 04-01-2017, 09:02 PM   #6 (permalink)
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I have clear the DTCs, so the Swift is OK, for now.
Should I wait till the MIL comes ON again, or can I test right now?
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Old 04-02-2017, 03:09 PM   #7 (permalink)
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Anybody knows a place selling reflashed ECU for the Swift?
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