HFM Code 77 (CO potentiometer Input short to positive)

		PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help
HFM Code 77 (CO potentiometer Input short to positive)

09-04-2008, 10:47 AM

PhantomLord PhantomLord is offline

Registered User

Join Date: Jan 2008

Posts: 92

HFM Code 77 (CO potentiometer Input short to positive)

Yesterday I replaced bad MAF on W124 E 220(M111.960) to fix rough idle, now I see HFM code 77, this particular model has O2 sensor and does not have CO potentiometer.

What could be the issue? is it the side effect of bad MAF? I tried clearing the code several times, but it keeps coming back.

P.S: Rough Idle and DTC 10 is fixed after MAF replacement.

Thank You

Bookmarks

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is On Trackbacks are On Pingbacks are On Refbacks are On Forum Rules

All times are GMT -4. The time now is 04:34 PM.