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Home >> Buick >> 2019 >> Regal TourX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Engine Controls And Fuel - 3.6L (LGX) - Diagnostic Information And Procedures (P0010-P0446)) >> Diagnostic Information and Procedures >> DTC P0121-P0123, P0222, P0223, P16A0-P16A2, or P2135 >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
5 V Reference P06A3 P0122*, P0222*, P16A0 P06A3 P0121, P16A2, P2135*
Serial Data P0122*, P0222*, P16A0 P0122*, P0222*, P16A0 P0123*, P0223*, P16A0**, P16A1**, P16A2** P0121, P16A2, P2135*
Low Reference - P0123*, P0223*, P16A1 - P0121, P16A2, P2135*
*This DTC sets when there is an internal component issue: Q38 Throttle Body
**A short to voltage causes P16A1 to set.If DTC P16A0, P16A1, P16A2 set at the same time, an intermittent circuit condition exists.
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