Part #4886751

Part number 4886751 is the OEM engine computer for the 1996 Ram Truck 8.0L Magnum V10, Chrysler's first year of OBD-II compliance on this platform. The PCM handles real-time closed-loop fuel control, misfire detection across all ten cylinders, evaporative emission system monitoring, and adaptive transmission line pressure management.

Hardware code 05014153AA(96MDL) is printed on the module's circuit board and is common to every 1996 Ram 8.0L V10 PCM regardless of calibration stamp. The unit attaches to the driver-side inner fender behind the battery tray via two or three mounting bolts, with the wiring harness connecting through two large multi-pin Mopar weatherpack plugs.

Before shipping, every module goes through a multi-stage remanufacturing process: board-level inspection under magnification, replacement of known failure-prone components (power transistors, capacitors, voltage regulators), full functional bench testing, and custom VIN programming with your truck's exact 17-digit identification number.

Replacing Part Number 4886751

Swap time is roughly 15 to 20 minutes. Start by disconnecting the battery. The PCM sits on the driver-side inner fender, behind the battery tray. Squeeze the locking tabs on each harness connector and pull them straight off, then unbolt the bracket. Mount the new module, reconnect both plugs, and reattach the battery. Since we flash the VIN, immobilizer codes, and calibration data before shipping, the truck starts immediately — no programming appointment needed.

Symptoms That Point to Part 4886751

If the original 4886751 module is going bad in your 1996 Ram 8.0L V10, expect some combination of the following:

• OBD-II Scanner No-Communication: A handheld scan tool or shop diagnostic computer reports no communication when connected to the 16-pin data link connector under the dash, indicating the PCM is not responding on the J1850 data bus.
• Automatic Transmission Limp Mode: The four-speed automatic defaults to second or third gear and will not shift through all forward gears, often accompanied by the check engine light and transmission-related fault codes.
• 5-Volt Sensor Reference Dropout: The internal voltage regulator fails, dropping the 5-volt reference line that feeds the MAP sensor, throttle position sensor, and other analog inputs, causing multiple simultaneous DTCs.
• Random Multiple Fault Codes: The check engine light illuminates with a cluster of seemingly unrelated codes — oxygen sensor, MAP sensor, TPS, vehicle speed sensor — pointing to an internal PCM failure rather than individual sensor problems.

When Calibration 4886751 Was Issued

Part number 4886751 dates to a specific point in the 1996 Ram 8.0L V10 production calendar. The 488674x stamps are the mid-production run. Chrysler issued this series once 1996 Ram 8.0L V10 assembly was established, after 4849358, 4849359, the 4850xxx revisions, and the standalone 4853980 calibration. It is stamp 5 of 6 in the 488674 group, between 4886750 and 4886756.

Alternate Part Number Formats for 4886751

Dealer and interchange listings often rewrite 4886751 as 04886751 or P04886751. Aftermarket catalogs may show P4886751. The calibration does not change. Only the printed form does.

Salvage Interchange Numbers for 4886751

Hollander lists 4886751 under interchange numbers 590-04172 and 590-04173. Both numbers identify the 1996 Dodge Ram 8.0L V10 PCM. The Hollander entry covers the hardware. The calibration stamped on the case still has to be 4886751.

OBD-II Codes When 4886751 Fails

4886751 is stamp 5 of 6 in the 488674 group. Shops working on this 488674 calibration most often find the following OBD-II codes already stored:

• P0340 — Camshaft Position Sensor Circuit: The PCM flags the camshaft position sensor circuit. On a failing module from this family the code can set while the sensor, connector, and tone wheel still test in spec, because the controller has stopped reading the CMP signal.
• P0720 — Output Speed Sensor Circuit: The transmission output-speed input is reported bad. Limp-mode shifting often shows up with it when the PCM, rather than the output speed sensor, has failed.

Emissions Certification for 4886751

This calibration meets Federal (50-state) emission standards for the 1996 model year. Part 4886751, stamp 5 of 6 in the 488674 group, was certified under that 1996 federal standard.

Letter Suffixes on 4886751

Chrysler used letter suffixes (AA, AB, AC, etc.) after the base number to indicate manufacturing date. All suffixes for 4886751 are functionally identical and interchangeable. The letters record when that individual module was built. 4886751AA and 4886751AB both order as 4886751.