U0153 — Data Bus: Supplementary Restraint System (SRS) Control Module: Right – No Communication #

Note: The code description may vary depending on the vehicle manufacturer.

• U0153: Lost Communication With Right SRS Control Module (Honda, Acura)
• U0153: Right SRS ECU No Response (Toyota, Lexus)
• U0153: No Data from Right SRS Control Unit (Ford, Lincoln)
• U0153: SRS Side Airbag Module Communication Failure (Hyundai, Kia)

Code U0153 Overview #

The diagnostic trouble code U0153 signals a loss of communication between the vehicle’s main data bus—often the CAN (Controller Area Network) bus—and the right-side SRS (Supplementary Restraint System) control module. The SRS is the system responsible for managing airbag and seatbelt pretensioner deployment during a crash. When the right SRS module fails to communicate, your vehicle’s safety systems may not function optimally. This code is typically set by the main body control module or the airbag control unit when it cannot “hear” from the right SRS controller over a certain period. In most modern vehicles, this communication is essential for advanced safety functions, and a loss of signal is taken very seriously by the onboard diagnostic system.

Common Symptoms for Code U0153 #

When U0153 is present, the driver may notice several warning signs, some subtle, others more obvious. The most prominent indicator is usually the airbag warning light or “SRS” indicator staying illuminated on the dashboard. In some cases, audible chimes or specific messages in the instrument cluster may alert you to a fault in the airbag system. Rarely, seatbelt pretensioners or side airbags may be disabled until the problem is resolved. Here are typical symptoms associated with this code:

• Airbag warning light illuminated
• “SRS system fault” or “Airbag system fault” message on the dash
• Loss of functionality for right-side airbags or seatbelt pretensioners
• Failure of the vehicle to pass state safety inspection
• Occasional chimes or beeping from the instrument panel

Likely Causes of Code U0153 #

While the U0153 code always means a communication loss, the underlying reasons can vary. The most frequent causes are related to wiring and connectors, but module failures or even network issues can be at play. Here is a ranking of probable causes, from most to least common:

1. Open or damaged wiring harness between the main CAN data bus and the right SRS control module
2. Poor electrical connections at the SRS module or related harnesses (corrosion, bent pins, loose terminals)
3. Faulty right SRS control module (internal failure of the airbag/pretensioner controller)
4. Damaged or corroded ground points for the SRS system
5. Faulty main body or airbag control unit (rare, but possible)
6. Recent collision repair with incorrect reassembly or missed connections

Step-by-Step Diagnostic Approach for U0153 #

Diagnosing U0153 requires methodical troubleshooting, starting with the basics and moving toward more advanced checks. Here’s a step-by-step guide a technician (or an advanced DIYer with the right tools) should follow:

• Check for other DTCs: Scan the vehicle for additional trouble codes, especially those related to the SRS, CAN bus, or other module communication issues. Address these codes first if present.
• Inspect all fuses: Locate the SRS and airbag-related fuses and verify none are blown. Replace as needed.
• Visual check of connectors: Examine the right SRS control module connector and the related harness for signs of corrosion, water intrusion, or physical damage.
• Wiggle test: With the ignition on, gently move the wiring harnesses leading to the SRS module to see if communication is restored (airbag light goes off or code clears).
• Continuity test: Using a multimeter, check for continuity between the SRS module connector and the main CAN bus. Look for open or shorted circuits.
• Check ground points: Ensure all SRS-related ground points are clean, tight, and free of corrosion.
• Module replacement: If all wiring tests good, suspect a faulty right SRS control module. OEM-level diagnostics may be required to confirm this before replacement.

Possible Repairs for U0153 #

Once the exact cause of U0153 is isolated, targeted repairs can restore communication and ensure your SRS system is ready to protect you. The repairs below correspond to each likely cause above:

• Repair or replace damaged wiring harnesses between the data bus and the SRS module
• Clean, repair, or replace connectors at the SRS module or harness
• Replace the right SRS control module (may require programming by the OEM or a qualified technician)
• Clean and secure SRS ground points as needed
• Replace the main control unit (rare, and only after all other causes are eliminated)
• Correct any errors from recent body/collision repairs (reconnect or replace missed/damaged components)

Can You Drive With Code U0153? #

Driving with code U0153 is not recommended. Although the vehicle may seem to operate normally, your supplemental restraint system may be compromised. This means that in the event of a collision, the right-side airbags and/or seatbelt pretensioners might not deploy as designed, increasing the risk of injury. For your safety and to comply with legal regulations, address this fault as soon as possible before driving regularly.

Vehicles Most Commonly Affected by U0153 #

While U0153 can occur in nearly any modern vehicle equipped with a multi-module airbag system, it is more commonly reported in certain makes and models that use separate right-side SRS control modules. The following vehicles are frequently associated with this code:

• Honda Accord, Civic, CR-V
• Toyota Camry, RAV4
• Acura TLX, MDX
• Ford Explorer, Edge
• Lexus RX, ES
• Hyundai Sonata, Santa Fe
• Kia Optima, Sorento

Common Mistakes & Best Practices for U0153 #

Misdiagnosis or incomplete repairs can lead to frustration and safety risks. Avoid these frequent errors, and follow best practices:

• Overlooking basic wiring issues: Always inspect and test wiring and connectors before replacing modules.
• Ignoring other related DTCs: Address all communication codes, not just U0153, for a comprehensive fix.
• Skipping OEM procedures: Follow the manufacturer’s diagnostic flowcharts and technical service bulletins (TSBs) when available.
• Reusing damaged connectors: Replace any terminals or connectors showing signs of heat, corrosion, or pin damage.
• Neglecting to clear codes after repair: Always clear DTCs and verify the repair by cycling the ignition and rescanning.

Quick FAQ for Code U0153 #

Still have questions? Here are fast answers to the most common concerns about U0153:

• Q: Will airbags still deploy with code U0153 present?
  A: There is a risk that the right-side airbags or seatbelt pretensioners will not function in a crash. The rest of the SRS system may still work, but full protection is not guaranteed.
• Q: Is it expensive to fix U0153?
  A: The cost depends on the root cause. Simple wiring or connector repairs are usually affordable. Module replacements and programming may be more costly if required.
• Q: Can I reset the code myself?
  A: You might clear the code with a scan tool, but unless the underlying problem is fixed, it will return. Always address the cause, not just the code.