P2457 on RAM
Exhaust Gas Recirculation Cooling System Performance
P2457 on RAM vehicles indicates exhaust gas recirculation cooling system performance. Au7o has documented this code across 1 RAM model — most commonly on 2500. 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. Typical repair costs on RAM range from $500 to $1,800, depending on the specific model and root cause.
Common Causes of P2457
- •Carbon-clogged/restricted EGR cooler
- •Loss of coolant flow through the cooler
- •Stuck EGR cooler bypass valve
- •Faulty temperature sensors used for the monitor
P2457 on RAM by Model
RAM 2500(1 issue)
- 6.7L Cummins EGR Cooler Clogging and Cracking2007-2024
The EGR cooler routes hot exhaust through a coolant-jacketed heat exchanger before recirculating it into the intake. Heavy soot loading progressively plugs the cooler and EGR valve, first showing as slight off-idle hesitation and rising EGTs, then triggering EGR flow/performance codes and limp mode. Worse, a clogged, thermally stressed cooler can crack internally and leak coolant into the exhaust/intake stream, causing white smoke, coolant loss, and potential hydrolock or catastrophic engine damage. Cummins service intervals call for cleaning the EGR valve/cooler roughly every 67,500 miles (2007.5-2018) or 75,000 miles (2019+), which many owners never perform.
Looking for P2457 on a different make?
View P2457 across all makes →Frequently Asked Questions
What does P2457 mean on RAM?▼
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. On RAM specifically, this code is documented across 1 model.
What causes P2457 on RAM vehicles?▼
Common causes on RAM: Carbon-clogged/restricted EGR cooler, Loss of coolant flow through the cooler, Stuck EGR cooler bypass valve, Faulty temperature sensors used for the monitor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2457 on a RAM?▼
Repair costs on RAM range from $500 to $1,800, depending on the specific model and root cause.
Which RAM models have P2457 documented?▼
Au7o has documented P2457 on 1 RAM model: 2500.