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Code 436-New O2 Sensor? 850 1994

posted by  tmannian on  Wed Dec 1 16:05 CST 2010
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last visit: Sat Sep 20 10:31 CST 2014
[RELATED]

Code 4-3-6

Condition

The rear HO2S constantly monitors the front HO2S and its short term fuel trim so that it matches the exhaust gas oxygen content. If the short term fuel trim differs, the rear HO2S makes fine adjustments to it. When this adjustment is excessive, the ECM interprets this as a fault with the front HO2S and DTC 4–3–6 is set.


Substitute value
Fuel trim shut off.


Possible source

-Uneven compression.
-Air leakage in the intake system.
-Air leakage in the exhaust system.
-Defective rear HO2S.
-Defective front HO2S.


Fault symptom[s]
May result in poorer performance.
--
If you're not driving it "like its stolen," are you really driving?






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