Having problems with your 1999 Cadillac DeVille ?
P0021 Just had my 1999 Cadillac Deville serviced and had a transmission and converter put in. My question is that my engine light is still on due to a sensor and faulty wiring with the code registring P0221 .Is it costly?
Repair Help & Product Troubleshooting for 1999 Cadillac DeVille
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