How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Lou P. master tech Your Own Question
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 4487
Experience:  15 years master certified 100% fix rate and have access to factory radio codes, wiring, and instructions.
Type Your Mercedes Question Here...
Lou P. master tech is online now
A new question is answered every 9 seconds

This is on a 2002 Mercedes see 240 you oxygen sensors have

Customer Question

This is on a 2002 Mercedes see 240 you oxygen sensors have been replaced all four and the check engine light does not come on but I code comes up for fuel tank pressure switch The car has the monitors that will not clear the O2 & the cat Car has over 1,000
mi on it after clearing codes Check temp befor and after cat 240 / 380'
Submitted: 2 years ago.
Category: Mercedes
Expert:  Lou P. master tech replied 2 years ago.
Hello , sorry for the delay. The fault is with the fuel pump assembly. There is a fuel tank pressure sensor that is most likely your fault. The car does not have a fuel pressure sensor , if there is a fault with the system it will not perform all the other tests needed for emissions. Hope this information helps Please take a second and click the box and rate my service GOOD OR EXCELLENT SERVICE if you feel I have been helpful and please request me in the future. If you feel I have not been helpful please DO NOT RATE BAD OR POOR AND WASTE YOUR MONEY , I will opt out to see if another expert can provide more or better assistance so you're not wasting your money!!. Thanks for choosing just answer. Lou. also , if you feel i deserve one , BONUSES are GREATLY APPRECIATED ! 😉

Related Mercedes Questions