P2457: Exhaust Gas Recirculation Cooling System Performance
2 vehicles · 2 makes · $500-$9,000 repair
Most Reported On
P2457 is an OBD-II diagnostic trouble code meaning “Exhaust Gas Recirculation Cooling System Performance.” Generic code set when the PCM determines the EGR cooler/cooling system is not lowering recirculated exhaust gas temperature as much as expected — the cooler is underperforming, often due to clogging, coolant flow loss, or a stuck bypass. This code is most commonly reported on 2007-2024 RAM 2500 (2500 6.7L Cummins), and 2019-2020 Lincoln Nautilus (Standard, Select, Reserve), with repair costs ranging from $500 to $9,000.
Common Causes
Typical Repair Cost
Based on 2 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P2457, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P2457 mean?
P2457 stands for "Exhaust Gas Recirculation Cooling System Performance." Generic code set when the PCM determines the EGR cooler/cooling system is not lowering recirculated exhaust gas temperature as much as expected — the cooler is underperforming, often due to clogging, coolant flow loss, or a stuck bypass.
What are the most common causes of P2457?
The most common causes of P2457 are: Carbon-clogged/restricted EGR cooler, Loss of coolant flow through the cooler, Stuck EGR cooler bypass valve, Faulty temperature sensors used for the monitor. The specific cause varies by vehicle.
How much does it cost to fix P2457?
Repair costs for P2457 range from $500 to $9,000, depending on the vehicle and root cause.
Which vehicles are affected by P2457?
Au7o has documented P2457 across 2 vehicle models from 2 manufacturers: Lincoln, RAM.
Sources (6)
- ForumClogged EGR cooler at 26,000 miles - Cummins Diesel Forum
- article6.7L Cummins EGR Cooler Clogging - Why It Happens and How to Prevent It - TruckTok
- manufacturerCummins 6.7L EGR Cooler 68048988AA - BulletProof Diesel
- TSB2.0L EcoBoost - Low Coolant/White Smoke/MIL with DTCs - 2019-2020 Edge/Nautilus (TSB 20-2234)
- Forum2019 Nautilus - White Smoke / Coolant Reservoir Empty / Smell inside - Lincoln Forums
- articleNewer Ford, Lincoln Vehicles Plagued by EcoBoost Coolant-Leak Defect, Class Action Says
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.