C230 Codes 0507 and P0170
10-29-2018, 03:00 PM
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1997 C230
C230 Codes 0507 and P0170
Went to Autozone for getting the codes:
P0507 Idle Air Control System RPM higher than expected
P0170 Fuel Trim (Bank 1)
Just replaced the Mass Air Flow-meter which I was told is code P0172 by the garage. Installed new Bosch Air flow-meter reset the code by disconnecting the Battery. Check engine light was off for about 100miles and came back on with the codes above.
Any recommendation for this?
P0507 Idle Air Control System RPM higher than expected
P0170 Fuel Trim (Bank 1)
Just replaced the Mass Air Flow-meter which I was told is code P0172 by the garage. Installed new Bosch Air flow-meter reset the code by disconnecting the Battery. Check engine light was off for about 100miles and came back on with the codes above.
Any recommendation for this?
10-30-2018, 03:17 AM
#2
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Actros4160SLT,
P0170 code - did you replace with an OEM Bosch MAF or generic?
A generic MAF will cause this code,
It could also be a vacuum leak or fuel injectors are not metering correctly. Add some Berryman B-12 into your fuel tank and system. I usually add it thru the brake booster vacuum line.
Plenty of how-to on the use of this great product. On occasion, you may get a vacuum leak in the BB line in side the check valve.
This may clear up the first code (P0507). If not then, it seems like a vacuum line is off or dislodged somewhere.
P0170 code - did you replace with an OEM Bosch MAF or generic?
A generic MAF will cause this code,
It could also be a vacuum leak or fuel injectors are not metering correctly. Add some Berryman B-12 into your fuel tank and system. I usually add it thru the brake booster vacuum line.
Plenty of how-to on the use of this great product. On occasion, you may get a vacuum leak in the BB line in side the check valve.
This may clear up the first code (P0507). If not then, it seems like a vacuum line is off or dislodged somewhere.
10-30-2018, 04:07 PM
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1997 C230
Hi khomer2
I used a OEM part made by Bosch for the MAF.
I also use an additive calls Sea-foam, which I poor in the Fuel tank to clean the Fuel system to keep it clean.
I am wondering now when I read this if there is a vacuum line off or dislodged because I just replaced the AC-Compressor and expansion valve and this started right after I was driving it for less then 50miles.
Thanks again for any advice
I used a OEM part made by Bosch for the MAF.
I also use an additive calls Sea-foam, which I poor in the Fuel tank to clean the Fuel system to keep it clean.
I am wondering now when I read this if there is a vacuum line off or dislodged because I just replaced the AC-Compressor and expansion valve and this started right after I was driving it for less then 50miles.
Thanks again for any advice
10-30-2018, 04:46 PM
#4
MBWorld Fanatic!
Hi khomer2
I used a OEM part made by Bosch for the MAF.
I also use an additive calls Sea-foam, which I poor in the Fuel tank to clean the Fuel system to keep it clean.
I am wondering now when I read this if there is a vacuum line off or dislodged because I just replaced the AC-Compressor and expansion valve and this started right after I was driving it for less then 50miles.
Thanks again for any advice
I used a OEM part made by Bosch for the MAF.
I also use an additive calls Sea-foam, which I poor in the Fuel tank to clean the Fuel system to keep it clean.
I am wondering now when I read this if there is a vacuum line off or dislodged because I just replaced the AC-Compressor and expansion valve and this started right after I was driving it for less then 50miles.
Thanks again for any advice
Typically, when seafoam or berryman is added thru the BB vacuum, a check engine light comes on after running the additive thru the system. You may want to first clear the code (with your scanner) and then operate as usual to see if the code pops up again.
Let us know.
11-01-2018, 07:42 PM
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1997 C230
Problem solved
See the arrow where I found the vacuum hose was dislodged. Per visual inspection hard to see, the hose was so close to the connector that it was only noticeable when I run my fingers from A to B an that vacuum hose. The Check Engine Light went off after the third time starting the engine and driven it. Possibility that the vacuum hose were dislodged during the AC-Compressor replacement and I have never notice it.
Thanks for the help.
Last edited by Actros4160SLT; 11-01-2018 at 07:44 PM.
