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Trouble code
P2457: EGR cooler performance (soot-clogged cooler)
The same code points to different failures on different engines. Below, engine by engine, are the documented failures whose records name P2457, with the record's own words, how to tell them apart and the usual fix. The meaning above is taken from the record EGR carbon and DPF regeneration faults (dual-loop EGR maintenance burden).
3.0 Power Stroke (2018-2021)EcoDiesel gen3 (Ram 1500 / Wrangler / Gladiator)
3.0 Power Stroke (2018-2021)
1 documented failure names this code. All about this engine
verified
How widespread: Common
Where its record names the code
- check engine with EGR codes - P2457 (cooler performance) points at a clogged cooler, bypass-valve codes at the valve
- P2457 with no drivability complaint = cooler performance test before parts
Its other signs
- the EGR bypass valve was subject to Ford recall/emission campaign 20E04 - verify completion by VIN before paying for parts
How to tell it apart
- read the EGR codes first and check recall 20E04 status by VIN - a completed campaign changes the diagnosis
- P2457 with no drivability complaint = cooler performance test before parts
Usual fix
replace the EGR bypass valve (verify the 20E04 campaign status first)
Recalls and bulletins
20E04
Root cause, parts and sources →
EcoDiesel gen3 (Ram 1500 / Wrangler / Gladiator)
1 documented failure names this code. All about this engine
aggregated
How widespread: Occasional
Where its record names the code
- EGR performance codes (P2457 family) and carbon-restricted EGR valves/cooler from the dual-loop (high + low pressure) circuit
Its other signs
- incomplete or frequent DPF regenerations, soot-load warnings, fuel dilution of the oil over many short regens
How to tell it apart
- read the EGR/DPF code split first: cooler-performance codes point at soot-clogged hardware, regen-frequency complaints at driving duty cycle
- repeated short trips = regen starvation; highway reset before parts
Usual fix
clean or replace the EGR valve / cooler when performance codes confirm soot restriction
Root cause, parts and sources →
A code tells you which system flagged a fault, not which part failed. Read it with the signs your truck shows: symptoms by engine. For your exact truck: check your VIN.