Part #4886863

Replacing the PCM on a 1996 Dodge Ram 8.0L V10? Part number 4886863 is the factory designation for this truck's powertrain computer. It manages sequential fuel injection timing, coil-on-plug ignition events, automatic transmission shift points, torque converter clutch engagement, and the full suite of OBD-II emissions monitors required for the 1996 model year.

This controller is built on hardware base 05014153AA(96MDL) — the same board used across all 52 calibration stamps for the 1996 Ram V10. It bolts to the inner fender on the driver side, tucked behind the battery tray where it stays protected from direct engine heat and road spray.

Our remanufacturing process begins with a full teardown and ultrasonic cleaning of the original PCM board. Capacitors, driver chips, and any components showing signs of thermal stress are replaced. The rebuilt unit is run through an automated test cycle that simulates cranking, idle, cruise, and wide-open-throttle conditions before being flashed to your truck's VIN.

How to Install Part #4886863

You will need a 10mm socket and about 20 minutes. Disconnect the battery ground strap first. The original module is on the inner fender, driver side, behind the battery tray. Detach the two weatherpack connectors by pressing the release tabs, remove the hold-down bolts, and lift the module out. Set the replacement in place, torque the bolts, snap the connectors back in, and reconnect the battery. The module ships fully programmed — your existing keys, fobs, and transmission adaptation all carry over.

Symptoms That Point to Part 4886863

A failing PCM (part #4886863) on the 1996 Ram V10 commonly produces these warning signs:

• 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.
• 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.

Where 4886863 Falls in the 1996 Model Year

Part number 4886863 dates to a specific point in the 1996 Ram 8.0L V10 production calendar. The 488686x stamps are late production. They were issued toward the end of 1996 Ram 8.0L V10 assembly, after the 488674x and 488679x groups and before the final seven-digit run, 488693x. It is the first of 5 stamps in the 488686 group. The other numbers are 4886864, 4886865, 4886866, 4886867.

Catalog Spellings of 4886863

If a search for 4886863 comes up empty, try P04886863, 04886863, and P4886863. The seven-digit engineering number, the leading-zero form, and the P-prefix form are the same part.

Hollander Lookup for 4886863

Hollander lists 4886863 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 4886863.

Diagnostic Codes for Calibration 4886863

Diagnostic trouble codes for a bad 4886863 module follow the 488686 family pattern. Check these before replacing sensors on a truck that is still running this calibration:

• P0562 — System Voltage Low: P0562 reports system voltage below the threshold the controller expects. On late 1996 calibrations it often traces to the PCM once the alternator and battery cables have been ruled out.
• P0688 — Auto Shutdown Relay Control Circuit: P0688 means the controller is not driving the ASD relay control circuit correctly. A no-start with good fuel pressure and a good crank signal often ends at this code on a failed late-production module.

Emissions Certification for 4886863

This calibration meets Federal (50-state) emission standards for the 1996 model year. Trucks that left the factory on calibration 4886863 were covered by that federal certification.

Letter Suffixes on 4886863

Chrysler used letter suffixes (AA, AB, AC, etc.) after the base number to indicate manufacturing date. All suffixes for 4886863 are functionally identical and interchangeable. Ignore the trailing letters when matching a core. 4886863AC is still 4886863.