2004 c230 runs rich then lean

What is your question?

i have replaced spark plugs, fuel filter,maf, upstream oxygen sensor. still the light comes on 171, 172, 175. i put over 1600.00 in and no change any ideas

What makes this problem better or worse?

no change

How long has your 2004 Mercedes-Benz C230 had this problem?

2 months

MARTHAwill in Menifee CA

Apr 21, 2018

Popular Answer

What are the best Mercedes-Benz repair shops?

RepairPal Certified shops can diagnose and repair your 2004 Mercedes-Benz C230. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

2004 Mercedes-Benz C230 auto repair 2004 Mercedes-Benz C230 estimates 2004 Mercedes-Benz C230 questions 2004 Mercedes-Benz C230 problems 2004 Mercedes-Benz C230 recalls

What is your question?

Popular Answer

2004 c230 runs rich then lean

What is your question?

i have replaced spark plugs, fuel filter,maf, upstream oxygen sensor. still the light comes on 171, 172, 175. i put over 1600.00 in and no change any ideas

What makes this problem better or worse?

no change

How long has your 2004 Mercedes-Benz C230 had this problem?

2 months

MARTHAwill in Menifee CA

Apr 21, 2018

1 Reply

Popular Answer

DaveJMon Apr 21, 2018

Sounds like a possible vacuum leak concern. But this is way too hard to theorize about without seeing the vehicle and monitoring the data from the engine's processor while the vehicle is running. Seek guidance from a Mercedes technician professional.

Join the conversation!

Popular Answer

What are the best Mercedes-Benz repair shops?

RepairPal Certified shops can diagnose and repair your 2004 Mercedes-Benz C230. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.