My Tracker just failed its emissions test, with 932ppm of NO, 757ppm allowed.
Hydro Carbons ppm was 3, and CO% was 0.00
The ECU has stored OBDII code P0031, which means low current draw on the pre-cat Oxygen sensor heater element.
It passed two years ago with the same code on the same oxygen sensor, and as its tested on a dyno and I assume the engine is worked hard enough to get the oxygen sensor hot enough to measure correctly.
High NO means I've got a lean mixture right? Do cold O2 sensors read richer or leaner than the actual condition?
I guess my plan is to buy a new O2 sensor and retest, anything else I should look for?
Hydro Carbons ppm was 3, and CO% was 0.00
The ECU has stored OBDII code P0031, which means low current draw on the pre-cat Oxygen sensor heater element.
It passed two years ago with the same code on the same oxygen sensor, and as its tested on a dyno and I assume the engine is worked hard enough to get the oxygen sensor hot enough to measure correctly.
High NO means I've got a lean mixture right? Do cold O2 sensors read richer or leaner than the actual condition?
I guess my plan is to buy a new O2 sensor and retest, anything else I should look for?