Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Jeep Compass TrailhawkFACTORY OEM SERVICE PROCEDURE
Unit, Def Dosing Control
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| P0562-00 | SYSTEM VOLTAGE LOW |
| P0563-00 | SYSTEM VOLTAGE HIGH |
| P05F8-00 | REDUCTANT HEATER CONTROL MODULE PERFORMANCE |
| P0601-00 | INTERNAL CONTROL MODULE MEMORY CHECKSUM ERROR |
| P0604-00 | INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY (RAM) ERROR |
| P0641-00 | SENSOR REFERENCE VOLTAGE 1 CIRCUIT |
| P0642-00 | SENSOR REFERENCE VOLTAGE 1 CIRCUIT LOW |
| P0643-00 | SENSOR REFERENCE VOLTAGE 1 CIRCUIT HIGH |
| P0652-00 | SENSOR REFERENCE VOLTAGE 2 CIRCUIT LOW |
| P0653-00 | SENSOR REFERENCE VOLTAGE 2 CIRCUIT HIGH |
| P06A6-00 | SENSOR REFERENCE VOLTAGE 1 CIRCUIT PERFORMANCE |
| P13ED-00 | UREA INJECTOR COIL TEMPERATURE PLAUSIBILITY ERROR |
| P13EE-00 | UREA CONTROL MODULE POWER RELAY DE-ENERGIZED PERFORMANCE - SOFTWARE RESET |
| P13EF-00 | UREA PUMP CONTROL POSITION SENSOR - ELECTRICAL FAILURE |
| P13F0-00 | UREA PUMP CONTROL INTERNAL FAILURE |
| P13F1-00 | UREA PUMP CONTROL PERFORMANCE ACTUATOR STUCK |
| P13F2-00 | UREA PUMP CONTROL PERFORMANCE/STUCK OFF LOW - INSUFFICIENT FLOW |
| P13F3-00 | UREA PRESSURE SENSOR SIGNAL NOT VALID |
| P13F4-00 | UREA PRESSURE SENSOR TEMPERATURE PLAUSIBILITY |
| P13F5-00 | UREA LEVEL SENSOR CIRCUIT RANGE/PERFORMANCE - PLAUSIBILITY CHECK BETWEEN SENSORS LEVEL |
| P13F6-00 | UREA LEVEL SENSOR CIRCUIT RANGE/PERFORMANCE - SIGNAL STUCK HIGH |
| P13F7-00 | UREA TANK SENSOR GENERAL ELECTRICAL FAILURE |
| P13FB-00 | UREA TANK HEATER CURRENT TOO HIGH |
| P13FC-00 | UREA TUBE HEATER CURRENT TOO HIGH |
| P202A-00 | REDUCTANT TANK HEATER CONTROL CIRCUIT/OPEN |
| P202B-00 | REDUCTANT TANK HEATER CONTROL CIRCUIT LOW |
| P202C-00 | REDUCTANT TANK HEATER CONTROL CIRCUIT HIGH |
| P202D-00 | REDUCTANT LEAKAGE |
| P202E-00 | REDUCTANT INJECTION VALVE CIRCUIT PERFORMANCE |
| P203A-00 | REDUCTANT LEVEL SENSOR CIRCUIT |
| P203B-00 | REDUCTANT LEVEL SENSOR 1 CIRCUIT PERFORMANCE |
| P203F-00 | REDUCTANT LEVEL TOO LOW |
| P2042-00 | REDUCTANT TEMPERATURE SENSOR 1 CIRCUIT |
| P2047-00 | REDUCTANT INJECTOR 1/1 CIRCUIT |
| P2048-00 | REDUCTANT INJECTION VALVE CIRCUIT LOW (BANK 1 UNIT 1) |
| P2049-00 | REDUCTANT INJECTION VALVE CIRCUIT HIGH (BANK 1 UNIT 1) |
| P204A-00 | REDUCTANT PRESSURE SENSOR CIRCUIT |
| P204B-00 | REDUCTANT PRESSURE SENSOR CIRCUIT PERFORMANCE |
| P204F-00 | REDUCTANT SYSTEM PERFORMANCE |
| P205B-00 | REDUCTANT TANK TEMPERATURE SENSOR CIRCUIT RANGE/PERFORMANCE |
| P206B-00 | REDUCTANT QUALITY SENSOR CIRCUIT PERFORMANCE |
| P208A-00 | REDUCTANT PUMP "A" CONTROL CIRCUIT/OPEN |
| P208B-00 | REDUCTANT PUMP 1 CONTROL PERFORMANCE |
| P208C-00 | REDUCTANT PUMP "A" CONTROL CIRCUIT LOW |
| P208D-00 | REDUCTANT PUMP "A" CONTROL CIRCUIT HIGH |
| P208E-00 | REDUCTANT INJECTOR STUCK CLOSED - BANK 1 UNIT 1 |
| P209F-00 | REDUCTANT TANK HEATER CONTROL CIRCUIT PERFORMANCE |
| P20B9-00 | REDUCTANT SUCTION LINE HEATER CONTROL CIRCUIT/OPEN |
| P20BA-00 | REDUCTANT HEATER 1 CONTROL CIRCUIT PERFORMANCE |
| P20BB-00 | REDUCTANT SUCTION LINE HEATER CONTROL CIRCUIT LOW |
| P20BC-00 | REDUCTANT SUCTION LINE HEATER CONTROL CIRCUIT HIGH |
| P20E8-00 | REDUCTANT PRESSURE TOO LOW |
| P20E9-00 | REDUCTANT PRESSURE TOO HIGH |
| P20EA-00 | REDUCTANT CONTROL MODULE POWER RELAY DE-ENERGIZED PERFORMANCE - TOO EARLY |
| P20F4-00 | REDUCTANT CONSUMPTION TOO LOW |
| P20F5-00 | REDUCTANT CONSUMPTION TOO HIGH |
| P20FF-00 | REDUCTANT CONTROL MODULE PERFORMANCE |
| P214F-00 | REDUCTANT HEATER 1 CURRENT TOO HIGH |
| P21A8-00 | REDUCTANT LEVEL SENSOR "B" CIRCUIT |
| P21C5-00 | REDUCTANT LEVEL SENSOR 1 STUCK |
| P21CB-00 | REDUCTANT CONTROL MODULE SUPPLY VOLTAGE LOW |
| P21CC-00 | REDUCTANT CONTROL MODULE SUPPLY VOLTAGE HIGH |
| P21CE-00 | REDUCTANT QUALITY MODULE PERFORMANCE |
| P21DD-00 | REDUCTANT HEATER 1 CURRENT TOO LOW |
| P2BA9-00 | NOX EXCEEDENCE - INSUFFICIENT REDUCTANT QUALITY |
| P2BAF-00 | NOX SYSTEM DRIVER INDUCEMENT ACTIVE |
| U0001-00 | CAN C BUS |
| U0073-00 | HYBRID/EV BUS OFF |
| U0100-00 | LOST COMMUNICATION WITH ECM/PCM |
| U0401-00 | IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM |
| U05A3-00 | INVALID DATA RECEIVED FROM REDUCTANT QUALITY MODULE |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.