I'M DESPERATE! 443 & 232 on A2. Please Help. [850][1995]

... posted by Black Adder  on Sunday, 18 February 2001, at 12:11 a.m.
 

               Car has 149K on the clock. No O2 sensors replaced yet. Vacuum lines and
               elbows look good. Here's the scoop:

               Codes 443(?) and 232 on A2. I have no clue what the 443 is. Anyone know?

               The 232 has been coming up ever since I had the fuel pump replaced. After
               clearing the A2 codes the car idles low and rough. It recovers some of the
               time but not always. Check engine light stays off for a while and then comes
               back on. The low and rough idle then disappear (is this the ECU
               compensating?).

               Mileage seems to be suffering now as well. Please help! Any info will be
               appreciated.

              ... posted by Michael Krutolow  on Sunday, 18 February 2001, at 4:12
               a.m. ...in response to "I'M DESPERATE! 443 & 232 on A2. Please Help."
               posted by Black Adder.
 

              443 - Three Way Catalytic Converter (TWC) efficiency low.

               232 - on LH 2.4, Motronic 4.3, Long term fuel trim, idling, at upper or lower
               limit (too Rich)

               On LH 3.2, Motronic 1.8, Long term tfuel trim, idling, at upper limit.

               Hope this helps.

               Mike

               Neither code isolates a bad part, not as easy to diagnose as a code which
               indicates something seemingly obvious like a bad O2 sensor (for example).
               I'd look for a vacuum leak to start with, then have someone check your fuel
               pressure. Also make sure there's no air hose leaks (and intercooler hoses if
               Turbo).
 

               John,

               I just had a fuel pump replaced and now the check engine light comes on. It
               makes sense that this could be a fuel pressure problem. Do you know if the fuel
               pump is adjustable in regard to its pumping volume or pressure? If so, I will
               take it back to the dealer that installed the pump and have them look into it.
               Thanks for the help.

               --
               Black Adder

               No,it's not adjustable.
               Another remote but possible cause of your problem might be a bad fuel
               pressure regulator. Sometimes the internal diapham splits and gas enters the
               vacuum hose to the intake manifold. That could cause your problems too.

Diagnostic code 2-3-2[850][1995]  Steve -- Friday, 27 July 2001, at 10:00 a.m.

Can anyone help me in figuring out why my "check engine" light is on? I am getting a diagnostic code of 2-3-2 from socket A-2. I checked with volvospeed.com and it states that most likely it is a vacuum leak but I wondered if anyone else has had this code and what the problem was.
--
Steve

I believe 2-3-2 in the A2 socket is a fuel trim lean or rich exhaust under partial throttle.

I say check fuel pressure, fuel filter (may need to be replaced), wastegate (have you adjusted it), air filter (maybe too clogged), air intake (may have a clog or collapsed section), MAF sensor, leak in the intake or intercooler ducting, diluted engine oil.

Yes it could also be a vaccuum leak, so track that down as well. At the most it should take one or two hours to check everything.