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Home >> Chevrolet >> 2013 >> Impala LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 428 (Keyless Entry System And Remote Functions) >> Diagnostic Information and Procedures >> DTC B3121 >> Conditions for Setting the DTC >> B3121 05

B3121 05

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.

The keyless entry control module detects a short to B+ or an open on the rear fascia keyless entry antenna signal circuit.

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