Part #4886798

Part number 4886798 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.

Every calibration in this group shares Chrysler hardware platform 05014153AA(96MDL). The module mounts on the driver-side inner fender, behind the battery tray, secured with factory bolts to a stamped steel bracket. Two multi-pin weatherpack connectors carry all sensor inputs and actuator outputs.

Each replacement unit is completely remanufactured: the original board is ultrasonically cleaned, failed components are replaced with updated parts where applicable, and every circuit is tested on a dedicated bench simulator that replicates real-world V10 operating conditions. The module is then programmed to your specific 17-digit VIN before it ships.

Replacing Part Number 4886798

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 4886798

When part number 4886798 fails on a 1996 Ram 8.0L V10, the truck typically shows one or more of these symptoms:

• Intermittent Stalling at Operating Temperature: The engine runs normally when cold but begins cutting out after reaching full operating temperature, sometimes restarting after a cool-down period of 20 to 30 minutes.
• Crank / No-Start Condition: The starter motor cranks the engine at normal speed but the engine will not fire due to loss of fuel injector pulse or ignition coil trigger signal from the PCM.
• 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.

When Calibration 4886798 Was Issued

Part number 4886798 dates to a specific point in the 1996 Ram 8.0L V10 production calendar. The 488679x stamps are mid-to-late production. They followed the 488674x mid-year run and were in service before the late-production 488686x calibrations. It is the last of 5 stamps in the 488679 group, following 4886797.

Alternate Part Number Formats for 4886798

Dealer and interchange listings often rewrite 4886798 as 04886798 or P04886798. Aftermarket catalogs may show P4886798. The calibration does not change. Only the printed form does.

Salvage Interchange Numbers for 4886798

Hollander lists 4886798 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 4886798.

OBD-II Codes When 4886798 Fails

4886798 is stamp 5 of 5 in the 488679 group. Shops working on this 488679 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 4886798

This calibration meets Federal (50-state) emission standards for the 1996 model year. Part 4886798, stamp 5 of 5 in the 488679 group, was certified under that 1996 federal standard.

Letter Suffixes on 4886798

Chrysler used letter suffixes (AA, AB, AC, etc.) after the base number to indicate manufacturing date. All suffixes for 4886798 are functionally identical and interchangeable. The letters record when that individual module was built. 4886798AA and 4886798AB both order as 4886798.