U0073 on RAM ProMaster
Factory diagnostic protocol and troubleshooting wire for fault code U0073 specifically for the RAM ProMaster (2020–2026, 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP)).
1. Symptoms of U0073 on RAM ProMaster
When the Engine Control Module (ECM/PCM) on your RAM ProMaster (3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP)) logs fault code U0073, drivers commonly observe:
2. Most Likely Causes on RAM ProMaster
Historical warranty claims and technical repair bulletins for RAM ProMaster point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for RAM ProMaster
Remove any aftermarket insurance dongles, GPS trackers, or scan tools plugged into the DLC port. on the RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
Inspect braided ground straps on engine and transmission. Clean all contact surfaces to bare metal. on the RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
Scan all modules on vehicle. Note which modules are online and which are offline to pinpoint the break in the network daisy-chain. on the RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
Verify 60 ohms across Pins 6 and 14 with battery disconnected. on the RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
Clear DTCs from all modules and road test to verify error-free network transmission. on the RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
Equipment for Diagnosing RAM ProMaster (U0073)
RAM ProMaster OEM Replacement Sensor
Direct-fit replacement assembly engineered to OEM tolerances for RAM ProMaster.
AstroAI Auto-Ranging Digital Multimeter
Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.
BlueDriver Bluetooth Pro OBDII Scan Tool
Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.
Other Common Fault Codes on RAM ProMaster
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the RAM ProMaster:
4. RAM ProMaster U0073 FAQs
What causes code U0073 to trigger on a RAM ProMaster?
On the RAM ProMaster (3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP)), U0073 is most frequently caused by Loose or corroded ground connection on transmission or frame or Faulty Transmission Control Module (TCM) or ABS module pulling bus down.
Where is the OBD-II port located on my RAM ProMaster?
On the RAM ProMaster, the 16-pin DLC diagnostic connector is located Driver side lower dash panel near hood release. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my RAM ProMaster with code U0073?
No. Bus is shut down due to excessive transmission errors, leaving vehicle in unpredictable limp mode. Given that U0073 carries a Critical severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.