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
2.4L - DTCS P2AF6 To U1504
- DTC Troubleshooting
- P2AF6-Starter Relay 3 Stuck Off
- P2AF7-Starter Relay "D" Control Circuit/Open
- P2AF8-Starter Relay "D" Control Circuit Low
- P2AF9-Starter Relay "D" Control Circuit High
- P3032-Barometric Pressure Sensor Performance Plausibility
- U0001-Can C Bus
- U0103-Lost Communication With Electric Gear Shift Module
- U0121-Lost Communication With Anti-Lock Brake Module
- U0125-Lost Communication With Dynamics Sensor
- U0128-Lost Communication With Park Brake Control Module
- U0129-Lost Communication With Brake System Control Module 1
- U0140-Lost Communication With Body Control Module
- U0151-Lost Communication With Occupant Restraint Controller
- U0155-Lost Communication With Cluster/CCN
- U0168-Lost Communication With Vehicle Security Control Module
- U017E-Lost Communication With SEATBELT Sensor 1
- U0402-Implausible Data Received From TCM
- U0404-Implausible Data Received From ESM
- U0405-Implausible Data Received From Cruise Control Module
- U0416-Implausible Data Received From Esp
- U0417-Implausible Data Received From Park Brake Control Module
- U0418-Implausible Data Received From Brake System Control Module 1
- U0422-Implausible Data Received From Body Control Module
- U0426-Implausible Data Received From Vehicle Security Control Module
- U0427-Implausible Data Received From Vehicle Security Control Module (SKREEM/WCM)
- U0428-Implausible Data Received From Steering Angle Sensor
- U0429-Implausible Data Received From Steering Control Module
- U0432-Invalid Data Received From Multi-Axis Acceleration Sensor Module
- U0447-Implausible Data Received From Central Gateway
- U047F-Implausible Data Received From SEATBELT Sensor 1
- U110A-Lost Communication With SCM - Can-C
- U110C-Lost Fuel Level Message
- U110E-Lost Ambient Temperature Message
- U1110-Lost Vehicle Speed Message
- U1120-Lost Wheel Distance Message
- U1133-Lost Stop/Start Switch 1 Message
- U1134-Lost Stop/Start Switch 2 Message
- U113E-Lost Communication With Intelligent Battery Sensor
- U1141-Lost Esp Torque Request Message
- U1186-Lost Communication With Adaptive Cruise Control Module
- U1199-Lost Hood Ajar Switch Voltage Message
- U11C2- Lost Transmission Message
- U11DD-Body Control Module Signal Invalid
- U11DE-Lost Speed Control Message
- U120C-Lost Brake Booster Signal
- U12A8-Lost Communication With Master Cylinder Pressure Sensor
- U1409-Implausible Left Front Wheel Speed Signal Received
- U140A-Implausible Right Front Wheel Speed Signal Received
- U140B-Implausible Left Rear Wheel Speed Signal Received
- U140C-Implausible Right Rear Wheel Speed Signal Received
- U1412-Implausible Vehicle Speed Signal Received
- U1431-Implausible Data Received From Cruise Control Module
- U1440-Implausible Transfer Case Ratio High Received
- U148C-Implausible Data Received From Stop/Start Button
- U1504-Implausible Message Data Length Received From Steering Angle Sensor
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.