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.
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HOMESERVICE MANUALSJEEP2008PATRIOT LIMITED, FWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
2008 Jeep Patriot Limited, FWD, Standard
Electronic Control Modules - Electrical Diagnostics
2008 Jeep Patriot Limited, FWD, StandardSECTION Electronic Control Modules - Electrical Diagnostics
- Diagnostic Code Index
- Electronic Control Modules - Electrical Diagnostics
- DTC Troubleshooting
- B2215-Front Control Module Internal
- U0001-Can C Bus Circuit
- U0019-Can B Bus
- U0021-Can B Bus (+) Circuit Open
- U0022-Can B Bus (+) Circuit Low
- U0023-Can B Bus (+) Circuit High
- U0024-Can B Bus (-) Circuit Open
- U0025-Can B Bus (-) Circuit Low
- U0026-Can B Bus (-) Circuit High
- U0027-Can B Bus (-) Shorted To Bus (+)
- U0100-Lost Communication With ECM/Pcm
- U0101-Lost Communication With TCM
- U0114-Lost Communication With All Wheel Drive Control Module
- U0121-Lost Communication With Anti-Lock Brake Module
- U0126-Lost Communication With Steering Angle Sensor (SAS)
- U0141-Lost Communication With Front Control Module (TIPM)
- U0151-Lost Communication With Occupant Restraint Controller (Orc)
- U0154-Lost Communication With Occupant Classification Module
- U0155-Lost Communication With Cluster/CCN
- U0167-Lost Communication With Intrusion Transceiver Control Module
- U0168-Lost Communication With Vehicle Security Control Module (SKREEM/WCM)
- U0184-Lost Communication With Radio
- U0186-Lost Communication With Audio Amplifier
- U0193-Lost Communication With Traffic Information Receiver Module
- U0195-Lost Communication With SDARS
- U0197-Lost Communication With Hands Free Phone Module
- U1105-Can B Signal Missing
- U1106-Can C Signal Missing
- U1107-Ecu In Single-Wire Mode
- U1108-Additional Can B Ecu Detected
- *Both Diagnostic Can C (+) And Diagnostic Can C (-) Circuits Open
- *Diagnostic Can C (+) And/Or Diagnostic Can C (-) Circuits High
- *Diagnostic Can C (+) Circuit Low
- *Diagnostic Can C (+) Circuit Open
- *Diagnostic Can C (+) Shorted To Diagnostic Can C (-)
- *Diagnostic Can C (-) Circuit Low
- *Diagnostic Can C (-) Circuit Open
- *No Response From Abs (Antilock Brake Module)
- *No Response From Amp (Amplifier)
- *No Response From AWD (All Wheel Drive Control Module)
- *No Response From CCN (Cluster)
- *No Response From ECM (Engine Control Module) - Diesel
- *No Response From HFM (Hands Free Module)
- *No Response From ITM (Intrusion Transceiver Module)
- *No Response From OCM (Occupant Classification Module)
- *No Response From Orc (Occupant Restraint Controller)
- *No Response From Pcm (Powertrain Control Module)
- *No Response From Radio
- *No Response From SDAR (Satellite Receiver)
- *No Response From Steering Angle Sensor (SAS)
- *No Response From TCM (Transmission Control Module) (CVT)
- *No Response From TIPM (Totally Integrated Power Module)
- *No Response From Traffic Information Receiver Module
- *No Response From WCM (Sentry Key Remote Entry Module)
- *Stored Lost Communication DTCS
- Standard Procedure
- DTC Troubleshooting
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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.