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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 33032
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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2003 Lincoln LS: V8..right bank O2 sensor slow response

Customer Question

2003 Lincoln LS 3.9 V8 right bank O2 sensor slow response. Replaced sensor twice. Cleaned wire plugs good and filled with dialectric grease. Check engine light will come on intermittantly and some times saty of for a month or 2. Plug and unplug the sensor to harness plug and check light will go off most time. It is not the sensor for sure and the sensor plug is clean and making good contact with the mate. AHere else can I look?
Submitted: 8 years ago.
Category: Ford
Expert:  Ron replied 8 years ago.


Thank you for asking your question on Just Answer.

Can you give me the code your getting?


Customer: replied 8 years ago.
Reply to Ron's Post: I don't have a diagnostic readout tool but the code if I am not mistaken is 133. ANyway the code readout is 'slow response right bank O2 sensor'.
Expert:  Ron replied 8 years ago.


Thank you for asking your question on Just Answer.

The lean code P0133 can be set for the following reasons.

  • HO2S may be contaminated (due to improper fuel or silicone)
  • HO2S signal circuit open
  • Leaks present in the exhaust manifold or exhaust pipes
  • HO2S is damaged or has failed
  • PCM has failed
  • Unmetered air like in and around the PCV valve and or hose.
Ron and 5 other Ford Specialists are ready to help you
Expert:  Ron replied 8 years ago.

Ford has a TSB that deals with this issue. Im sending it for your review.