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Italy, Rome
1 Level
682 Review
68 Karma

Review on Denso 234 5113 Oxygen Sensor Ratio by Jacob Brooks

Revainrating 5 out of 5

Smoothed out my idle and cleared DTCs

I replaced the pre-block 1 O2 sensor on my Mustang GT with this and my car now idles noticeably better. The b1s1 sensor is out of order. My old upstream oxygen sensor had done about 54,000 miles and was dirty. Covered with charcoal. It issued DTCs. I am about to buy another Denso sensor to replace my top bank 2 sensor. I assume the other OEM sensor is just as dirty and therefore having trouble getting an accurate O2 reading.

Pros
  • Rugged build
Cons
  • Malfunctions