28 RAM diagnostic codes on file — with the full diagnosis, repair steps, and field insights open to read free, no signup required.
Disclaimer: General reference information for trained, qualified technicians only. Codes and procedures vary by model, serial number and software version. Always follow the manufacturer's service manual and your site's safety procedures. Use at your own risk. Not affiliated with or endorsed by any manufacturer.
Find a RAM code by searching below, or browse the table. Codes on file by system:
| Code | System | Symptom | Full fix |
|---|---|---|---|
| C0031 | Chassis (ABS) | ABS / Service 4WD / Traction Off. | View fix |
| C0034 | Chassis (ABS) | ABS / Service 4WD / Traction Off. | View fix |
| C0037 | Chassis (ABS) | ABS / Service 4WD Lights. | View fix |
| C003A | Chassis (ABS) | ABS / Service 4WD / Traction Off. | View fix |
| C006C | Chassis (ESC) | Stability Control Disabled. | View fix |
| Manual Reset | HVAC | Split temps (Hot/Cold); Air stuck on defrost or floor; No response to temp changes. | View fix |
| P0087 | — | Engine bogs under load; "Fuel Filter Low Pressure" warning; Stalling. | View fix |
| P0191 | — | Erratic idle; Engine "clatter"; Sudden stalling. | View fix |
| P020F | Cummins 6.7L | Engine "stumble" or miss; Knocking sound under load; Increased exhaust smoke; CEL on. | View fix |
| P0401 | — | Rough idle; EGR "Service" message; High intake temps. | View fix |
| P0471 | — | Exhaust brake feels weak; Poor fuel economy; Turbo lag. | View fix |
| P0507 | — | Engine idles higher than normal (900+ RPM); Hissing sound from engine bay. | View fix |
| P0713 | Thermal Sensor | Delayed Cold Shifts / Check Trans Message | View fix |
| P0730 | Ratio / Slip | Trans Temp Warning / Limp Mode (4th Gear) | View fix |
| P0734 | Gear Ratio | Slip Under Heavy Towing / Limp to 3rd | View fix |
| P0744 | Torque Converter | TCC Shudder / High Operating Temperature | View fix |
| P0751 | Shift Solenoid | Missing 1st & 4th Gears / Long Shift Flare | View fix |
| P0871 | Pressure Sensing | Check Engine Solid / Stuck in 4th Limp | View fix |
| P0876 | Pressure Sensing | Erratic Shift Stumble / 4th Gear Limp | View fix |
| P0880 | Power Supply | No Forward or Reverse / Defaults to 4th | View fix |
| P208D | — | DEF gauge reads empty when full; Service DEF system message; 5 MPH derate. | View fix |
| P20EE | — | "SCR Efficiency Below Threshold"; Check engine light; Potential DEF derate timer. | View fix |
| P2262 | — | Low power; No turbo boost; "Service Electronic Braking System" message (sometimes). | View fix |
| P226C | — | Slow boost response; Excessive black smoke on acceleration. | View fix |
| P229E | Aftertreatment (NOx) | MIL (Check Engine Light) & Potential Derate. | View fix |
| P229F | Cummins 6.7L | Check Engine Light; DEF/SCR warning on dash; Potential "Speed Limited" countdown (Limp Mode). | View fix |
| P2563 | — | Exhaust brake stays on or won't engage; Poor throttle response. | View fix |
| Service Light Indicator | — | — | View fix |
Same codes keep 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.
AM Fleet Integrity gives you QR-code operator reporting, preventive maintenance scheduling, and predictive alerts in one place. Start your 14-day free trial — no credit card required.
Start your free trial