U0151 on 2019 Jeep Cherokee: Lost Communication With Airbag Module Causes & Fixes

What's Unique About the 2019-2019 Jeep CHEROKEE

For the 2019 Jeep Cherokee (KL generation), the U0151 code is a straightforward communication failure with the airbag system. While the causes are typical for network codes (wiring, power, module failure), it's critical to note that the ORC module is located under the center console. Wiring in this area, particularly the connectors under the front seats, can be disturbed by items stored there or by rear passengers' feet, a common point of failure discussed by owners. There was also a recall for some 2019 Cherokees related to faulty airbag sensors (Recall V63), which, while not directly causing U0151, indicates a sensitivity within the platform's SRS system.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Airbag warning light is illuminated on the instrument cluster.
• A 'Service Restraint System' or similar message appears on the driver information center.
• An audible chime may sound when the ignition is turned on.
• The airbag light may be intermittent at first, turning on and off with vehicle startup or movement, before eventually staying on permanently.

Most Likely Causes

1. Wiring or Connector Issue 🔴 High Probability Wiring under the seats or center console can be damaged or disconnected by debris or passengers' feet, interrupting the connection to the ORC module. This is a widely reported issue in owner forums.
   How to confirm: Visually inspect the wiring harnesses leading to the ORC module under the center console and, most importantly, the yellow connectors under both front seats for damage, corrosion, or loose connections. A multimeter can be used to check for continuity on the CAN bus wires.
   Typical fix: Repair the damaged wiring or clean and re-secure the connectors. Some owners have had success simply unplugging and replugging the under-seat connectors. In one documented case, a dealer fixed an 'open' circuit found during diagnostics for the cost of one hour of labor.
   Est. part cost: $5-$100
2. Blown Fuse or Power/Ground Supply Issue 🟡 Medium Probability An electrical short elsewhere or a simple fuse failure can cut power to the ORC module, causing it to go offline.
   How to confirm: Check the fuses related to the Occupant Restraint Controller / Airbag system in the under-hood fuse box. Key fuses to inspect on the KL Cherokee are F58, F88, F96, and F97. Use a multimeter to verify 12V power and good ground continuity at the ORC module's electrical connector.
   Typical fix: Replace the blown fuse after identifying the cause of the overcurrent. Repair any faulty power or ground wires.
   Est. part cost: $1-$20
3. Faulty Occupant Restraint Controller (ORC) Module 🟡 Medium Probability → Shop Air Bag Control Module Internal failure of the module due to component fatigue, moisture, or software corruption can prevent it from communicating.
   How to confirm: If wiring, fuses, power, and ground are all confirmed to be good, and a professional scan tool cannot communicate with the module, the ORC itself is the likely culprit.
   Typical fix: Replace the ORC module. This is not a DIY job, as the new module must be programmed to the vehicle's VIN and calibrated. Alternatively, the original module can be sent to a service for a reset, which is a more cost-effective option.
   Est. part cost: $200-$500
4. CAN Bus Network Fault ⚪ Low Probability A fault in the twisted-pair CAN bus wiring anywhere in the vehicle can disrupt communication for multiple modules, including the ORC.
   How to confirm: Check the CAN bus resistance at the OBD-II port (pins 6 and 14) with the battery disconnected. It should be approximately 60 ohms. This requires a professional scan tool with network diagnostic capabilities for a full analysis.
   Typical fix: Isolate and repair the short or open in the CAN bus wiring harness.
   Est. part cost: $10-$250

Rare But Worth Checking

• Low Battery Voltage: → Shop Vehicle Battery

Diagnosis Steps

1. Safety First: Disconnect the vehicle's battery for at least 30 minutes before inspecting or touching any airbag system components to allow system capacitors to discharge.
2. Scan for Codes: Use a professional-grade scan tool capable of reading SRS/airbag system codes to confirm U0151 is active and see which other modules are reporting the communication loss.
3. Check Fuses: Inspect all fuses related to the airbag system and Occupant Restraint Controller. On a 2019 Cherokee, key fuses are located in the under-hood fuse box, specifically check fuses F58, F88, F96, and F97.
🎬 See this guide to locate your airbag fuses and relays
4. Inspect Under-Seat Wiring: This is a critical step for the Cherokee. Thoroughly inspect the yellow connectors and wiring harnesses under both the driver and passenger seats. Look for any signs of damage, pinching, loose connections, or debris.
5. Inspect ORC Module Wiring: Visually inspect the wiring harness leading to the center console where the ORC module is located. A video guide shows the removal process, which can help in accessing these connectors.
🎬 Watch: How to remove and reset the ORC module
6. Test Power and Ground: Using a multimeter and a wiring diagram, carefully test for battery voltage (approx. 12V) and a solid ground connection (less than 0.1 Ω) at the ORC module's main connector.
7. Test CAN Bus: With the battery disconnected, measure the resistance between pins 6 and 14 of the OBD-II port. A reading of approximately 60 ohms indicates the main network terminating resistors are intact. Further network tests require an oscilloscope or advanced scan tool.
8. Module Diagnosis: If all wiring, power, and network tests are passed, the ORC module itself is the most likely cause of the failure.

Parts You'll Likely Need

• Occupant Restraint Controller (ORC) Module (OEM #68421925AA, 68469499AA, 68469498AA (Note: Multiple part numbers exist, confirm with VIN)) — If wiring and power supply are confirmed to be good, the module itself is the point of failure, having failed internally. VIN confirmation is essential before ordering.
  Trusted brands: Mopar
  OEM price range: $330-$510
  Aftermarket price range: $150-$300 (for a reset/rebuilt service)

Related Codes That Often Appear With This One

• U0128 — Lost Communication With Park Brake Control Module. As cited in TSB #1807722, this can appear with U0151, suggesting a broader network communication issue.
• U0416 — Implausible Data Received From ESP. As cited in TSB #1807722, this points to a potential network-wide problem affecting multiple safety systems.
• U0418 — Implausible Data Received From Brake System. Also cited in TSB #1807722, its presence alongside U0151 strengthens the case for a general CAN bus fault rather than just an isolated ORC module failure.

Technical Service Bulletins (TSBs) & Recalls

• 1807722: This TSB from 2022 lists U0151 - Lost Communication With Occupant Restraint Controller alongside several other communication codes, indicating it can be part of a wider network issue on the 2019 Cherokee.
• 08-019-19 REV. B: This TSB addresses various radio software glitches, including resets and lockups. While not directly for U0151, an intermittently resetting radio (which is a network module) can sometimes cause widespread communication issues on the CAN bus, making this a relevant check if other electronic issues are present.

Platform-Specific Known Issues

• Recall V63 (July 2019): FCA recalled 41,169 2019 Jeep Cherokees because impact and acceleration sensors could fail, reducing the system's ability to detect a crash. While this doesn't directly cause U0151, it highlights known sensitivities in the 2019 model's airbag system.
• Under-Seat Connector Vulnerability: A recurring theme in owner forums is the sensitivity of the wiring connectors located under the front seats. Items pushed under the seat or rear passengers' feet can easily disturb these connections, leading to an intermittent or constant airbag light and communication codes like U0151.

Mechanic-Grade Diagnostic Values

• CAN Bus Network Resistance — expected: ~60 Ω (with battery disconnected, measured between pins 6 and 14 of the OBD-II port). Failure: A reading of ~120 Ω suggests an open circuit or that one of the two terminating resistors is offline. A reading near 0 Ω indicates a short between the CAN High and CAN Low wires.
• CAN High Voltage to Ground — expected: 2.5V to 3.0V (Key On, Engine Off). Failure: Significant deviation from this range indicates a fault on the CAN High circuit.
• CAN Low Voltage to Ground — expected: 2.5V to 2.0V (Key On, Engine Off). Failure: Significant deviation from this range indicates a fault on the CAN Low circuit.
• ORC Module Ground Circuit Resistance — expected: Less than 0.1 Ω to 0.2 Ω (measured between the ground pin on the ORC connector and a clean chassis ground point). Failure: Higher resistance indicates a poor ground connection, which can prevent the module from powering on and communicating.
• ORC Module Power Supply Voltage — expected: 12.0V ± 0.5V (measured at the power supply pin on the ORC connector with key on). Failure: Low or no voltage indicates a problem with the fuse or power supply wiring.

Scan Tool Commands That Help

• wiTECH 2.0 (or equivalent professional scanner): ABS Initialization — After replacing or reprogramming the ORC module, the ABS module may need to be re-initialized to ensure all safety systems are communicating correctly.
• wiTECH 2.0 (or equivalent professional scanner): Clear All DTCs — After performing repairs and re-initialization routines, this command is used to clear all stored fault codes across all modules.
• wiTECH 2.0 (or equivalent professional scanner): Reprogram ORC / Flash ECU — When installing a new ORC module, it must be programmed to the vehicle. This function downloads the correct software and VIN configuration to the new module.
• wiTECH 2.0 (or equivalent professional scanner): Longitudinal & Lateral Sensor Calibration — This may be required after ORC replacement or reprogramming to ensure the stability control system, which works in conjunction with the SRS, is properly calibrated.

Wiring & Ground Locations

• ORC Module Ground — The ORC module is located under the center console. Its ground connection is typically made via its mounting bolts to the vehicle chassis.. A poor or corroded ground connection at the module's mounting point can prevent it from powering on, leading directly to a U0151 communication failure.
• G300 / G301 — On similar Jeep platforms (WJ Grand Cherokee), these grounds are located under the front passenger (G300) and driver (G301) seats, secured to the floor pan.. These grounds service various interior modules, including door modules and power seats. While not a direct ground for the ORC, a fault here can introduce electrical noise or issues on the network, and their location is near the vulnerable under-seat SRS wiring.
• CAN Bus Terminating Resistors — On some FCA vehicles, the two 120-ohm terminating resistors for the CAN bus are located internally within the BCM (Body Control Module) and the ORC (Occupant Restraint Controller) or ABS module.. If the ORC module contains one of the terminating resistors, its failure or disconnection will change the total network resistance from 60 ohms to 120 ohms, which is a key diagnostic indicator of the problem's source.

Real Owner Repair Stories

• YouTube user comment/video (Jeep vehicle (model not specified, but general principle applies)) — No communication with the ORC module using an OBD-II scanner.
  ❌ Tried (didn't work) Initial scans could not connect to the module at all.
  ✅ What actually fixed it The root cause was a poor ground connection. The mounting bolt for the ORC module was not making a clean connection to the chassis, preventing the module from getting power. Cleaning the connection and tightening the bolt restored communication.