My recently purchased CDI came at a great price, but also came complete with CEL illuminated. P0670 and P0299. P0299 is turbo underboost, but today's question is about the P0670.

Doing a search on that, the general consensus is the glow plug module. I searched for a replacement, it appears that Beru makes the OE, but Dorman also makes it. The cheapest I found the Dorman 904-310 was about $130, and Beru was in the mid $200s. I opted for the Dorman. I plugged it in, and immediately got the CEL for p0683, which is communication from glow plug module to PCM.

I thought maybe I tugged too hard on the connector wiring, so I plugged the old Beru back in, get p0670 again...Return to the Dorman, get p0683.

Some said.. bad ground at the manifold. I checked that...it is solid and good connection to the ground pin on the connector.

BTW, glow plugs all ohm-out good, and car starts quick and smooth both warm and cold.

Has anyone else had problems with the Dorman's? I'll go ahead and spring for the Beru if that's the problem, but I'd like some confidence that that's the issue.

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Mark in MA
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