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CEL codes help :help:

Rolando

By Rolando
in 986 Series (Boxster, Boxster S)

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Rolando Member

Rolando

Posted
Posted (edited)

Boxster 98 90K miles, manual (desnorkeled /defoamed filter) :drive:

Some weeks ago I got the CEL codes: P0102 (Mass Air Flow sensor- Below lower limit), P1124 (Oxygen Sensor adaptation area 1 [cylinder 1-3] -Rich Threshold, P1126 Oxygen Sensor adaptation area a [cylinder 4-6] -Rich Threshold).

After replacing MAF P0102 went away. :rolleyes:

Later I got CEL code: P0440 (Fuel Tank Ventilation System- above limit)

Replaced fuel tank cap, CEL did not come up again. :thumbup:

Currently still getting P1124 and P1126. I assume this is due to a vacuum leak (more air than the MAF registers). System runs lean so the sensors try to adjust but reach the max they can do –exceeding the Rich Threshold.

I need validation with this assumption :unsure: please

Also getting CEL code P1602 (voltage supply –open circuit) ~here I am lost …any ideas. :help:

Edited by Rolando
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