2023-2025 Acura Integra ECM: Programming, Replacement, and Why a Used Module Can Be Tricky

ECM Variants for the 2023-2025 Acura Integra

The Acura Integra uses different Engine Control Modules depending on the engine and transmission combination. It is critical to match the part number exactly when sourcing a replacement. Using the wrong module will result in a no-start condition or improper vehicle function.

The #1 Issue: ECM Programming and Immobilizer Sync

Replacing the ECM in a 2023-2025 Acura Integra is not a simple plug-and-play job. The replacement module, whether new or used, must be programmed to your specific vehicle. This process involves two key steps: writing your car's Vehicle Identification Number (VIN) into the module and synchronizing it with the immobilizer system. The immobilizer is an anti-theft system that prevents the engine from starting unless it recognizes a programmed key. If the ECM is not correctly paired with the immobilizer, the engine will crank but will not start, and you will likely see a flashing green key symbol on the dashboard.

Who Can Program a 2023-2025 Integra ECM?

• Acura Dealerships: Dealers have the proprietary Honda Diagnostic System (HDS) software required for the job. However, they are often unwilling to install or program parts not purchased directly from them.
• Independent Repair Shops: Some well-equipped independent shops that specialize in Honda/Acura vehicles may have professional tools like the Autel IM508/IM608 or a J2534 pass-through device that can perform the necessary programming.
• Automotive Locksmiths: Advanced automotive locksmiths often have the same high-end tools as independent shops and can program the ECM and keys.

Symptoms of a Failing Integra ECM

A bad engine computer can cause a variety of symptoms, which can sometimes be intermittent, making diagnosis difficult.

• Persistent Check Engine Light: The light stays on even after other related parts (like sensors) have been replaced.
• Engine Stalling or Misfiring: The engine may stall unexpectedly, misfire during acceleration, or run rough.
• No-Start or Hard-Start Condition: The engine cranks but refuses to start, or takes multiple attempts to turn over. This is a classic sign of an immobilizer issue after an incorrect ECM swap.
• Poor Engine Performance: You may notice a sudden drop in fuel economy, hesitation when accelerating, or a general lack of power.
• Transmission Shifting Problems: The ECM communicates with the transmission controller, so a failing module can cause harsh or erratic shifting.
• Scanner Cannot Communicate with ECM: If a standard OBD-II scanner fails to connect to the engine computer, it's a strong indication the module itself has failed.

Common Diagnostic Trouble Codes (DTCs)

While many codes can point to a bad ECM, codes in the P06xx range often indicate an internal module failure. A failed ECM can also cause a cascade of other codes related to sensors it controls, such as:

• P0600 - P060A: Internal Control Module Malfunctions.
• P0657: Actuator Supply Voltage 'A' Circuit/Open.
• P0340: Camshaft Position Sensor 'A' Circuit.
• P0123: Throttle/Pedal Position Sensor/Switch 'A' Circuit High.
• Immobilizer Communication Errors: A diagnostic tool may report "no communication between ECM/PCM and immobilizer unit".

Known Issues, Recalls, and TSBs for 2023-2025 Integra

While there are no widespread recalls specifically for ECM failure as of mid-2026, the vehicle generation has some notable issues and recalls you should be aware of:

• NHTSA Recall 24V744000 (Steering Gearbox): This major recall affects 2023-2025 Integras and addresses a defect that can cause sticky, stiff, or difficult steering. This is a mechanical issue, not related to the ECM.
• NHTSA Recall for VSA Modulator: Some 2023 models were recalled for a faulty Vehicle Stability Assist (VSA) modulator control unit that could leak brake fluid.
• Anecdotal Engine/Electrical Shutdowns: Some owners of 2023 models have reported the engine and electrical system shutting off randomly while driving. While the exact cause is not specified in a recall, this type of symptom could potentially be linked to the ECM or its power supply.

Buying a Used 2023-2025 Integra ECM: What You Must Know

A used OEM engine computer can be a cost-effective solution, but it comes with significant risks if you are not prepared.

1. Verify the Part Number: Before anything else, ensure the part number on the used ECM is an exact match for the one in your vehicle. Check the table above for common numbers.
2. Secure a Programmer FIRST: This is the most important step. Call local independent shops or automotive locksmiths and ask them two questions: 1) "Can you program a replacement ECM for a 2025 Acura Integra?" and 2) "Are you willing to program a used ECM that I provide?" Get a quote for the programming service. Do not buy the part until you have a confirmed 'yes'.
3. Inspect the Unit: When you receive the used ECM, check for any physical damage, corrosion on the pins, or signs that the case has been opened.
4. Consider a Mail-In Repair Service: An excellent alternative to buying a used ECM is to have your original module repaired. Companies that offer this service can diagnose and fix the internal components of your specific unit. The primary benefit is that your original VIN and immobilizer programming are retained, making the repaired module a true plug-and-play solution with no additional programming needed.

Cost to Replace an Acura Integra ECM

Costs can vary significantly based on the part source and labor rates in your area. New aftermarket or remanufactured units are generally not available for this new of a vehicle as of mid-2026.

Frequently Asked Questions (FAQ)