Catalytic Converter Estimate QnA

[PROW355]

Here is an update on my Catalytic Converter problem. After receiving the quote from the above shop (+$3000) I took the X to a different shop (Huntzberry Import Automotive) and I had a smoke test done. The mechanic found a vacuum leak (near the manifold) and plugged it. I paid under $100 for the work and after driving it I now only am getting code P1093 - Manifold Control Fuel + Air Metering, Auxiliary Emission Control. I will be doing some searching on the forum for some info for this code but I would appreciate any help. I figure it could be an O2 sensor, but I am assuming. Thanks for everyones advice...I hope this helps others in the future...dont waste your money when someone says replace everything without knowing for sure the real problem.

The initial mechanic was so wrong, not only did he try to rip me off, he didnt even mark the vehicle as Manual transmission, which it is.

[ExpensiveTaste]

My wife's car is having the same problem (P1093 keeps coming back with P0313 when fuel is low) after replacing the throttle body elbow when P0174 was the code. We've tried replacing all O2 sensors, spark plugs, thermostat, air filter, fuel filter/regulator, and had a smoke test done coming up with no leaks. We've tried swapping the injectors on bank 1 and bank 2 to no avail.

FYI, the P1093 comes up as Fuel Trim too Rich in second bank (Cylinders3-6). Others have further explained the cause of the error as a lean condition causing fuel trims to reach their limit of dumping fuel in (1). P1093 is said to be equivalent to BMW code 236 which is Pre-Cat Bank 2, Fuel Trim.

I'm curious as to what the difference is between P1093 and P0174 (system too lean bank 2).

The next thing we're going to try is swapping the coils on bank 1 to bank 2.

[upallnight]

Originally Posted by ExpensiveTaste

My wife's car is having the same problem (P1093 keeps coming back with P0313 when fuel is low) after replacing the throttle body elbow when P0174 was the code. We've tried replacing all O2 sensors, spark plugs, thermostat, air filter, fuel filter/regulator, and had a smoke test done coming up with no leaks. We've tried swapping the injectors on bank 1 and bank 2 to no avail.

FYI, the P1093 comes up as Fuel Trim too Rich in second bank (Cylinders3-6). Others have further explained the cause of the error as a lean condition causing fuel trims to reach their limit of dumping fuel in (1). P1093 is said to be equivalent to BMW code 236 which is Pre-Cat Bank 2, Fuel Trim.

I'm curious as to what the difference is between P1093 and P0174 (system too lean bank 2).

The next thing we're going to try is swapping the coils on bank 1 to bank 2.

Could be the camshaft sensor.

[ExpensiveTaste]

Originally Posted by upallnight

Could be the camshaft sensor.

Wouldn't there be a camshaft sensor related code? None of the searched threads ask the question, why bank 2 only?

[upallnight]

Originally Posted by ExpensiveTaste

Wouldn't there be a camshaft sensor related code? None of the searched threads ask the question, why bank 2 only?

Sometime you have to search outside Xoutpost.

Ses p1093


Since the owner brought it to a dealer we can only hope that what they told the owner was the truth about the cause of his problem.

[ExpensiveTaste]

Originally Posted by upallnight

Sometime you have to search outside Xoutpost.

Ses p1093


Since the owner brought it to a dealer we can only hope that what they told the owner was the truth about the cause of his problem.

Ok, good find, I'll bring this info to my BMW Tech friend when he brings the X5 to the dealer. If mine also shows a bad camshaft sensor, I'll surely post on every thread I can find that P1093 has been fixed on two accounts by replacing the camshaft sensor.

[ExpensiveTaste]

P1093 seems to have been the a tear in the larger cap at the back of the intake manifold for me.

[bcredliner]

Originally Posted by PROW355

Here is an update on my Catalytic Converter problem. After receiving the quote from the above shop (+$3000) I took the X to a different shop (Huntzberry Import Automotive) and I had a smoke test done. The mechanic found a vacuum leak (near the manifold) and plugged it. I paid under $100 for the work and after driving it I now only am getting code P1093 - Manifold Control Fuel + Air Metering, Auxiliary Emission Control. I will be doing some searching on the forum for some info for this code but I would appreciate any help. I figure it could be an O2 sensor, but I am assuming. Thanks for everyones advice...I hope this helps others in the future...dont waste your money when someone says replace everything without knowing for sure the real problem.

The initial mechanic was so wrong, not only did he try to rip me off, he didnt even mark the vehicle as Manual transmission, which it is.

Have you cleared the codes and the P1093 came back?

[bcredliner]

Originally Posted by bcredliner

Have you cleared the codes and the P1093 came back?

Any troubleshooting or potential fixes are shots in the dark without your symptoms.