had lower grill replaced afterwards outside temperture reading only shows -40 nothing found in owners manual.
Feb 17, 2018 at 4:13 AM
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CARADIODOC
✓Experienced Mechanic
34,408 POSTS
That is the default reading when the air temperature sensor is disconnected or a wire is cut. Given the recent service, the old sensor might have been missing and the wires were torn off. The sensor could still be on the old grille.