: Diagnostic Code help



feef706
03-19-04, 12:20 PM
My check engine light came on today and said service emissions system, it gave me the code PC0139 Current. Can someone tell me what this code is? Thanks James

BeelzeBob
03-19-04, 01:20 PM
My check engine light came on today and said service emissions system, it gave me the code PC0139 Current. Can someone tell me what this code is? Thanks James

Pre converter O2 sensor slow response. Likely need to replace the O2 sensor that is immediately ahead of the cat.