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Michael, ASE Certified Technician
Category: Volvo
Satisfied Customers: 905
Experience:  Volvo Master technician, ASE Master, EPA 608&609 certified
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my 2000 s70 continues to show these dtc codes p1670, p1671,

Customer Question

my 2000 s70 continues to show these dtc codes p1670, p1671, p1672, I cant find them anywhere. what are they?
Submitted: 8 years ago.
Category: Volvo
Expert:  Michael replied 8 years ago.

Theses codes are for the immobilizer communication. The antenna ring is the most common failure. This is also all you can replace with out going to the dealer.

I would suggest replacing the antenna ring your self and clear out the codes.
The antenna ring is located on the end of the ignition switch. It is a fairly cheap part. The plastic cover around the steering column needs to be removed. There are 3 T-25 screws on the bottom side.

Let me know if you need more help.