These 49 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 49 times.
| Code | Definition | Repair coverage |
|---|---|---|
| P202A | Reductant Tank Heater Control Circuit/Open | 4 ranked fixes |
| P202B | Reductant Tank Heater Control Circuit Low | 4 ranked fixes |
| P202C | Reductant Tank Heater Control Circuit High | 4 ranked fixes |
| P209F | Reductant Tank Heater Control Circuit Performance | 4 ranked fixes |
| P20B1 | Reductant Heater Coolant Control Valve Circuit/Open | 4 ranked fixes |
| P20B2 | Reductant Heater Coolant Control Valve Performance/Stuck Open | 4 ranked fixes |
| P20B3 | Reductant Heater Coolant Control Valve Circuit Low | 4 ranked fixes |
| P20B4 | Reductant Heater Coolant Control Valve Circuit High | 4 ranked fixes |
| P20B5 | Reductant Metering Unit Heater Control Circuit/Open | 4 ranked fixes |
| P20B6 | Reductant Metering Unit Heater Control Circuit Performance | 4 ranked fixes |
| P20B7 | Reductant Metering Unit Heater Control Circuit Low | 4 ranked fixes |
| P20B8 | Reductant Metering Unit Heater Control Circuit High | 4 ranked fixes |
| P20B9 | Reductant Heater A Control Circuit/Open | 4 ranked fixes |
| P20BA | Reductant Heater A Control Circuit Performance | 4 ranked fixes |
| P20BB | Reductant Heater A Control Circuit Low | 4 ranked fixes |
| P20BC | Reductant Heater A Control Circuit High | 4 ranked fixes |
| P20BD | Reductant Heater B Control Circuit/Open | 4 ranked fixes |
| P20BE | Reductant Heater B Control Circuit Performance | 4 ranked fixes |
| P20BF | Reductant Heater B Control Circuit Low | 4 ranked fixes |
| P20C0 | Reductant Heater B Control Circuit High | 4 ranked fixes |
| P20C1 | Reductant Heater C Control Circuit/Open | 4 ranked fixes |
| P20C2 | Reductant Heater C Control Circuit Performance | 4 ranked fixes |
| P20C3 | Reductant Heater C Control Circuit Low | 4 ranked fixes |
| P20C4 | Reductant Heater C Control Circuit High | 4 ranked fixes |
| P20C5 | Reductant Heater D Control Circuit/Open | 4 ranked fixes |
| P20C6 | Reductant Heater D Control Circuit Performance | 4 ranked fixes |
| P20C7 | Reductant Heater D Control Circuit Low | 4 ranked fixes |
| P20C8 | Reductant Heater D Control Circuit High | 4 ranked fixes |
| P214F | Reductant Heater A Current Too High | 4 ranked fixes |
| P215E | Reductant Heater D Current Too Low | 4 ranked fixes |
| P215F | Reductant Heater D Current Too High | 4 ranked fixes |
| P21C2 | Reductant Heater Relay Control Circuit/Open | 4 ranked fixes |
| P21C3 | Reductant Heater Relay Control Circuit Low | 4 ranked fixes |
| P21C4 | Reductant Heater Relay Control Circuit High | 4 ranked fixes |
| P21DD | Reductant Heater A Current Too Low | 4 ranked fixes |
| P221C | Reductant Heater B Current Too Low | 4 ranked fixes |
| P221D | Reductant Heater B Current Too High | 4 ranked fixes |
| P221E | Reductant Heater C Current Too Low | 4 ranked fixes |
| P221F | Reductant Heater C Current Too High | 4 ranked fixes |
| P223A | Reductant Heater E Control Circuit | 4 ranked fixes |
| P223B | Reductant Heater F Control Circuit | 4 ranked fixes |
| P241E | Reductant Heater Coolant Control Valve Stuck Closed | 4 ranked fixes |
| P248A | Reductant Heater A Sense Circuit Low | 4 ranked fixes |
| P248B | Reductant Heater A Sense Circuit High | 4 ranked fixes |
| P248C | Reductant Heater B Sense Circuit Low | 4 ranked fixes |
| P248D | Reductant Heater B Sense Circuit High | 4 ranked fixes |
| P24D2 | Reductant Heater A Sense Circuit | 4 ranked fixes |
| P24D3 | Reductant Heater B Sense Circuit | 4 ranked fixes |
| P263D | Reductant Heater Driver Performance | 4 ranked fixes |
This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:
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