p2181
Moderate
RAM · Trucks
Cooling System Performance
Quick Answer
Error code P2181 on your RAM Trucks means: Cooling System Performance. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Monitor coolant temperature during engine warm-up with scanner
2
Inspect cooling system for leaks or low coolant
3
Feel radiator hoses for proper temperature progression
4
Check radiator fins for dirt or debris blockage
5
Replace thermostat or water pump if temperature regulation fails
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Thermostat assembly
Water pump
Coolant
Radiator hose kit
Radiator flush kit
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