P0030 O2 sensor heater control circuit

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What would the likely cause be? I have tested voltage (gets 5 volts). I thought it was supposed to receive 12, but when I supply it with 12, I get a different code indicating voltage too high. Disconnected that wire and we're back to the original P0030 code. What should I check next?

Skibum42 in Portage IN

Nov 5, 2016

What are the best Volkswagen repair shops?

RepairPal Certified shops can diagnose and repair your 2003 Volkswagen Golf. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

P0030 O2 sensor heater control circuit

What is your question?

Skibum42 in Portage IN

Nov 5, 2016

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What are the best Volkswagen repair shops?

RepairPal Certified shops can diagnose and repair your 2003 Volkswagen Golf. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.