RAM Fault Code
Free · no signupP0880
No Forward or Reverse / Defaults to 4th
System
Power Supply
Symptom
No Forward or Reverse / Defaults to 4th
Diagnosis & fix steps
LOGIC: Transmission Control Module (TCM) Power Input Signal Malfunction.
ACTION: Test power and ground circuits to the TCM (or integrated PCM) under an active 5-amp load. On older RAM models, inspect the Transmission Control Relay contacts and output pins inside the Totally Integrated Power Module (TIPM) for corrosion.
Red Seal field insights
TIPM Relay Failures: Internal relays soldered to the multi-layer TIPM circuit board develop pitted, burned contacts. Under shift load, voltage sags below operating thresholds, forcing the transmission into direct mechanical limp mode.
Same code keeps coming back?
That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.
Read before you touch anything
- This is general reference information, not a repair manual. It is for trained, qualified technicians.
- Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
- Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
- You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
- Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.
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Start your free trialRelated RAM fault codes
- P208DDEF gauge reads empty when full; Service DEF system message; 5 MPH derate.
- P0876Erratic Shift Stumble / 4th Gear Limp
- P20EE"SCR Efficiency Below Threshold"; Check engine light; Potential DEF derate timer.
- P0871Check Engine Solid / Stuck in 4th Limp
- P2262Low power; No turbo boost; "Service Electronic Braking System" message (sometimes).
- P0751Missing 1st & 4th Gears / Long Shift Flare
- P226CSlow boost response; Excessive black smoke on acceleration.
- P0744TCC Shudder / High Operating Temperature
- P229EMIL (Check Engine Light) & Potential Derate.
- P0734Slip Under Heavy Towing / Limp to 3rd