What does RAM fault code P0471 mean?

Q: What does RAM fault code P0471 mean?

P0471 indicates: Exhaust brake feels weak; Poor fuel economy; Turbo lag. Fix: Exhaust Pressure Sensor Range/Performance. LOGIC: The Exhaust Backpressure (EBP) sensor reading doesn't match the Boost/Baro sensors at key-on. ACTION: 1. Locate the EBP sensor (on the thermostat housing area). 2. Remove the metal tube leading to the exhaust manifold. FIX: Clean soot from the EBP sensor tube; replace EBP sensor.

RAM Fault Code

Free · no signup

P0471

Exhaust brake feels weak; Poor fuel economy; Turbo lag.

System

Not specified

Symptom

Exhaust brake feels weak; Poor fuel economy; Turbo lag.

Diagnosis & fix steps

Exhaust Pressure Sensor Range/Performance. LOGIC: The Exhaust Backpressure (EBP) sensor reading doesn't match the Boost/Baro sensors at key-on. ACTION: 1. Locate the EBP sensor (on the thermostat housing area). 2. Remove the metal tube leading to the exhaust manifold. FIX: Clean soot from the EBP sensor tube; replace EBP sensor.

Red Seal field insights

The small metal tube that connects the sensor to the exhaust manifold gets 100% plugged with soot. If the tube is blocked, the sensor is "blind" to actual pressure.

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.

Book an uptime review

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.

Track this across your whole fleet

This code is free to read. AM Fleet Integrity lets your team log fault codes against assets, plus the full fault-code library, QR operator reporting, PM scheduling and predictive alerts. Start free — no credit card required.

Start your free trial

Related RAM fault codes

← All RAM fault codes