Cross Count TLR and TRL Illustration
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Cross count is the speed at which an oxygen sensor can oscillate between a rich to lean air/fuel mixture (or lean to rich). The faster the cross counts, the more accurate the ECU is able to adjust the air/fuel ratio. A new oxygen sensor will have a cross count of 50 to 100 milliseconds (Apx. 1/20 of a second). An aging oxygen sensor may have a cross count as slow as 500 milliseconds (one half second) although this sounds fast, in the world of electronics, this is slow. If the sensor has a slow cross count, the ECU is not receiving updates fast enough to efficiently manipulate the fuel flow through the injectors. An oxygen sensor with a sluggish cross count may not be easily identifiable, it may appear to be operating properly as your check engine light isn’t on and a diagnostic check may not indicate a fault code, but you may notice poor performance and reduced gas mileage.
NGK, Denso and Bosch oxygen sensors have the fastest cross count in the industry. Because they are produced to the highest quality standards, NGK, Denso and Bosch are the worlds leading suppliers of original equipment oxygen sensors. This means you are getting dealer quality without the dealer price. |
