2015 Ram ProMaster City ECM: Programming, Recalls, and Why It Might Not Be Your Problem

Symptoms of a Failing ECM in a 2015 Ram ProMaster City

A failing ECM can cause a wide range of confusing and intermittent issues. Because it controls so many different systems, symptoms can often mimic other problems. Always perform a full diagnosis before condemning the computer.

• Check Engine Light: This is the most common symptom. The light may be on steadily or flashing. Specific codes are needed to narrow down the problem.
• Engine Stalling or Misfiring: The engine may stall unexpectedly, run rough, or misfire, especially under load.
• No-Start or Hard Starting: The engine may crank but refuse to start, or take an extended time to fire up. This can be due to a lack of spark or fuel injector pulse, both of which are controlled by the ECM.
• Poor Engine Performance: You might notice a significant loss of power, hesitation during acceleration, or poor fuel economy.
• Erratic Transmission Shifting: The ECM communicates with the transmission controller. A faulty ECM can send bad data, leading to harsh, late, or incorrect shifts.
• Network Communication Codes: Fault codes starting with 'U' (e.g., U0100) indicate a loss of communication between modules, which can point to an ECM failure.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

Before replacing your ECM, be aware of these known issues that can mimic a computer failure. A dealer or qualified shop can check if these have been performed on your vehicle.

Recall S24 / NHTSA 16V-202: Water Intrusion & Unintended Shift to Neutral

This is the most critical issue for these vans. Water can get into a CAN-C bus network connector located under the driver's seat. This causes corrosion and disrupts communication between the main computers, including the ECM and Transmission Control Module (TCM).

• Symptom: The transmission may unexpectedly shift into Neutral when the vehicle comes to a stop, and you may not be able to re-engage a gear.
• The Fix: Dealers will relocate the connector to a protected area and replace it if corrosion is found. This issue is often misdiagnosed as a failed ECM or TCM, so it should be the first thing you check.

TSB 18-030-16: Powertrain Software Update

Chrysler released a software update for the ECM to fix several issues that trigger the check engine light. If your van has not had this update, a simple re-flash at the dealer could solve your problem without needing a new part. This update addresses false codes for:

• P0456 - EVAP System Small Leak
• P0335 - Crankshaft Position Sensor Circuit
• P0133 - O2 Sensor 1/1 Slow Response
• P2610 / P1607 - PCM Internal Timers
• U0402 - Implausible Data Received From TCM

2.4L Tigershark Engine Oil Consumption

The 2.4L engine in the ProMaster City is known for potentially consuming excessive amounts of oil. If the oil level gets too low, the engine can stall or run poorly, which might be mistaken for an ECM issue. Check your oil level frequently. An engine stalling from oil starvation is a mechanical issue, not an electronic one.

Buying a Used 2015 ProMaster City ECM: What You Must Know

Buying a used ECM can save you hundreds of dollars, but it's critical to understand the requirements. Unlike a simple mechanical part, you cannot just swap it in.

Programming is NOT Optional

A replacement ECM, whether it is new, remanufactured, or used, must be programmed to your vehicle's specific Vehicle Identification Number (VIN). This process pairs the computer to your van's other electronic modules and, most importantly, to the immobilizer system. Without proper programming, the engine will not start.

Part Number Compatibility

You will see two main sets of part numbers for this ECM:

• Hardware Number: 05150961AC. This is the physical hardware number of the module.
• Software/Calibration Numbers: 68232044AA, 68232044AB, 68232044AC, and so on, up to 68232044AG or higher. These represent different software versions, with later letters (like AG) being newer updates.

When buying used, it's best to match the hardware number (05150961AC). The software can be updated during the programming process. Some sellers offer pre-programmed modules where you provide your VIN, which can simplify installation.

Physical Inspection

When your used ECM arrives, inspect it carefully before installation:

• Connector Pins: Check for any bent, broken, or corroded pins.
• Case: Look for signs that the case has been opened, such as pry marks or broken seals. This could indicate a failed repair attempt.
• Corrosion: Any white or green crusty buildup on the case or connectors is a major red flag for water damage.

ECM Replacement and Programming Procedure

While the physical replacement is straightforward for a moderately skilled DIYer, the electronic programming is a job for professionals.

Who Can Program the Module?

• Dealerships: They have the factory-required wiTECH diagnostic tool and are the most reliable option, though often the most expensive.
• Independent Repair Shops: Many professional shops have advanced scan tools (like Autel or Snap-on) with subscriptions that allow them to perform VIN programming and key relearn procedures.
• Automotive Locksmiths: Mobile locksmiths who specialize in modern vehicles often have the tools and expertise to program ECMs and immobilizer keys, sometimes at a lower cost than a dealer.

Cost Comparison: New vs. Used vs. Remanufactured

Frequently Asked Questions (FAQ)