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Discussion Starter · #1 ·
got two codes: p0432 and p0422 below is the freeze frame data



Fuel Sys 1: CL

Fuel Sys 2: CL

Calc LOAD(%) 10.1

ECT: 186

STFT B1(%):-3.9

LTFT B1(%): 2.3

STFT B2(%): -3.1
LTFT B2(%): 3.9

Engine RPM: 1720

Vehicle Speed: 38mph
 

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Discussion Starter · #4 ·
01 s80 t6 getting 14mpg, lack of acceleration. Hoping its not the cats.

Was hoping someone could explain the freeze frame data.
 

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Here is the information as per Volvo:

(P0432) ECM-4801 Three-way catalytic converter (TWC) efficiency, bank 1. Intermittent fault, B6284T
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Diagnostic trouble code (DTC) information

Condition
The control module continuously checks three-way catalytic converter (TWC) efficiency by comparing signals from the rear heated oxygen sensor (HO2S) with the front heated oxygen sensor (HO2S). Diagnostic trouble code (DTC) ECM-4801 will be stored if the efficiency of the three-way catalytic converter (TWC) deviates too much.

Substitute value
Rear heated oxygen sensor (HO2S) control is disabled.
Possible source
misfiring
air leakage in the intake system
air leakage in the exhaust system
faulty fuel pressure
uneven compression
defective three-way catalytic converter (TWC).

Fault symptom
malfunction indicator lamp (MIL) lit.


(P0422) 284: ECM-4801 Three-way catalytic converter (TWC) efficiency, bank 1. Intermittent fault, B6284T
Print

Diagnostic trouble code (DTC) information

Condition
The control module continuously checks three-way catalytic converter (TWC) efficiency by comparing signals from the rear heated oxygen sensor (HO2S) with the front heated oxygen sensor (HO2S). Diagnostic trouble code (DTC) ECM-4801 will be stored if the efficiency of the three-way catalytic converter (TWC) deviates too much.

Substitute value
Rear heated oxygen sensor (HO2S) control is disabled.
Possible source
misfiring
air leakage in the intake system
air leakage in the exhaust system
faulty fuel pressure
uneven compression
defective three-way catalytic converter (TWC).

Fault symptom
malfunction indicator lamp (MIL) lit.
 

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could be restricted cats or more likely a MAF, boost leak, Boost pressure sensor, ECT sensor....something causing it to get out of fuel control basically.
 

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Both of the codes dictate it could be the converter but it could be many other things. By default, if there is a lean run condition (or any other condition listed above) the car will run incredibly rich as a safety measure. You will need to look at each of the above conditions and find the culprit. Considering the longer you run the car in this condition the more likely you are to damage the converter if it is not already.
 

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had similar problem and it turned out to be air leakage in the black plastic intake tube over the top of the engine between the MAF and the turbos.
There was a crack under where the clamps sit allowing it to suck in more air than the MAF had measured. O2 sensors detect bank 1 is running lean and try to compensate. Causes fuel mixture to be off ; notice the difference in STFT and LTFT between your banks 1 and 2.
Take off both the tubes over engine ( other is from turbos to the intercooler hose) and carefully inspect especially ends.
They crack if taken off too often or too roughly.
 

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Try running it with the MAF unplugged. If that helps it doesnt necessarily mean the MAF is bad though, it'll just make it run rich instead of lean. Also try disconnecting battery neg cable to reset ECM and TCM. Trans module gets confused easily by fouled front O2 sensors (lambda, used to retard timing between shifts) and by clogged injectors (will shift into neutral so you can coast to a stop.) A lot of people keep replacing MAFs and thinking trans is blown because these things never seem to pop an injector code.
 

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Discussion Starter · #10 ·
decided to check, yep not just a small crack but very noticeable cracks in both of them. Anyway to fix this by some kind of tape or does it have to be replaced? Thanks!
 

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best is to change them but they are expensive.
As an alternative test and possible fix I'd try a high temp metal tape ( it get very hot over the engine) . 3M makes a flue tape (2113na) that takes 600 deg and is about $10 a roll .Degrease the area . Tightly work the tape over the crack to be sure to seal it. ( pressure is not great so it should stop leak).
Try to wrap the cracks so the tape overlaps and end sticks to itself , not the plastic.
May work and is a cheap fix if it does. At a minimum you can erase the codes and drive this way for a while to check that it has fixed your problem before buying new tubes.
 

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Discussion Starter · #12 ·
So it was on that one but also noticed on all of the tubes, ones from the inter cooler also had cracks, would this cause an error too?
 

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the system assumes that all the air that passes through the MAf ( assuming that's working properly) reaches the cylinders. The engine management system sets the air/fuel ratio dependant on the amount of air and lots of other factors) load, air temp etc) and the feedback from the O2s.
If air is sucked in after the MAf but before the turbos or blown out after the turbos ( slightly higher pressure than atmospheric) the ratio will be off and picked up by the O2's
That then causes the system to compensate via fuel trim ( + or -). When it goes out of a predetermined range it sets the fault codes and changes to prefixed "substitute " values
It all has to be airtight.
 

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Discussion Starter · #14 ·
the system assumes that all the air that passes through the MAf ( assuming that's working properly) reaches the cylinders. The engine management system sets the air/fuel ratio dependant on the amount of air and lots of other factors) load, air temp etc) and the feedback from the O2s.
If air is sucked in after the MAf but before the turbos or blown out after the turbos ( slightly higher pressure than atmospheric) the ratio will be off and picked up by the O2's
That then causes the system to compensate via fuel trim ( + or -). When it goes out of a predetermined range it sets the fault codes and changes to prefixed "substitute " values
It all has to be airtight.
Thanks, i sealed the huge crack from the MAF/filter and code has yet to come back, but still a little power loss... seems like my TCV is bad again since it will go then boost will drop, then come back, so much for that IPD one i bought. :/
 
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