OBD Guide
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P117F

Bank 4 Oxygen Sensor Correction Behind Converter Rich Control Limit Exceeded

P117F is an OBD-II diagnostic trouble code meaning: Bank 4 Oxygen Sensor Correction Behind Converter Rich Control Limit Exceeded. Common causes: bank 4 oxygen sensor malfunction, fuel leak in the fuel system. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Increased fuel consumption
  • Unstable engine operation
  • Check Engine light comes on
  • Reduced engine power
  • Smell of gasoline from the exhaust pipe

Causes

  • Bank 4 oxygen sensor malfunction
  • Fuel leak in the fuel system
  • Dirty or faulty fuel injectors
  • Problems with the catalytic converter
  • Oxygen sensor circuit malfunction

How to Fix

  1. Check the bank 4 oxygen sensor and its circuit
  2. Check the fuel system for leaks
  3. Clean or replace fuel injectors
  4. Check the condition of the catalytic converter
  5. Reset the error code and run a test test

Related codes

P117EP1180P0172

FAQ

What does the P117F code mean?

P117F is an OBD-II diagnostic trouble code that indicates: Bank 4 Oxygen Sensor Correction Behind Converter Rich Control Limit Exceeded

What causes a P117F error code?

The most common causes of P117F include: Bank 4 oxygen sensor malfunction; Fuel leak in the fuel system; Dirty or faulty fuel injectors; Problems with the catalytic converter.

How do I fix a P117F diagnostic trouble code?

To fix P117F: Check the bank 4 oxygen sensor and its circuit. Check the fuel system for leaks. Clean or replace fuel injectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P117F?

Yes, but get it checked soon

How much does it cost to fix P117F?

The estimated repair cost for P117F is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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