129D-4
UnclassifiedCooling
What This Code Means
Substitute value is taken for Oxi Cat temperature upstream sensor
Possible Causes
- •Defect in the electrical signal of the Oxi Cat temperature upstream sensor
Related Winco Fault Codes
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Get a diagnosis walkthrough for 129D-4 on your specific Winco unit — cited to the OEM manual, not a forum guess.
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