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Home >> Chevrolet >> 2022 >> Tahoe SSV >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (4 Of 5)) >> Diagnostic Information and Procedures >> DTC P143C, P20C1-P20C4, P221E, or P221F >> Diagnostic Aids

Diagnostic Aids

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If the control circuits of any reductant heater are shorted together, DTCs for all reductant heaters will be set and all the reductant heaters will be disabled.

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