04 156 1.9 jtd 16v Fault codes :confused: - Alfa Romeo Forum
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04 156 1.9 jtd 16v Fault codes :confused:

Hi everyone,

Im totally confused as to whats going on with my alfa 156 at the moment,

I have read 2 fault codes off the ECU

1238- Air quantity above target quantity
21- drivers side curtain air bag explosive charge.

Its been in and out of the garage a few times and had the lights cancelled but they keep coming back

ANyone any idea what might be causing these codes.

Also the car felt really slugish today and was smoking really badly if I tried to accelerate especially when the turbo should come on???

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The smoking/sluggishness is possibly a split (or blown off) turbo host. Not sure why that would give the fault code indicated though...

The airbag issue is probably a bad connection somewhere...and if I had to guess it'd be the one connecting that airbag to the loom. Could be a tricky one to pin down though.
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airbag connections are in the boot on the drivers side behind the lining, to the rear of the suspension strut, yellow wires and plugs. give em a clean and should all be well. edit: you may have to shove your hand in there and have a fish around grabbing at wires if you can't see them, there is enough slack so dont worry. they maybe cable tied on somewhere, I cant remember from when I did mine exactly!

as for the other error code, test your EGR. you are able to read the codes so I guess you have the software so can run an actuator test on it. should be able to hear it clicking away in there. it maybe stick completely or may just need cleaning to allow it to close fully.

Previous Alfas:
1999 156 1.8TS Sport Pack 3
2001 166 3.0 V6 24V Super
2003 156 GTA 3.2 V6 24V
2005 156 1.9 JTDM-Jet Sport
2008 159 1.9 JTDM Lusso

Current Alfas:
1997 GTV 2.0TS Lusso
2001 147 1.6TS Lusso
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156 , 16v , codes , confused , fault , jtd

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