P2457: Exhaust Gas Recirculation Cooling System Performance
4 vehicles · 4 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 2011-2019 Ford F-250 Super Duty, 2015 BMW 7 Series (740Ld xDrive), and 2007-2024 RAM 2500 (2500 6.7L Cummins), plus 1 other vehicle, with repair costs ranging from $500 to $9,000.
Common Causes
Typical Repair Cost
Based on 4 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P2457.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the 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 tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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Vehicles Affected (4)
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 4 vehicle models from 4 manufacturers: BMW, Ford, Lincoln, RAM.
Sources (10)
- NHTSANHTSA Manufacturer Communications Data Corpus
- RecallNHTSA Recall 21V-907 - Exhaust Gas Recirculation (EGR) Cooler, N57T High-Pressure Diesel
- RecallNHTSA Recall 18V-755 owner notification - EGR Cooler, 2013-2017 BMW diesels
- Recall2015 BMW 740Ld EGR Valve Recall - NHTSA Campaign 18V755000
- 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.