P207F on RAM
Reductant Quality Performance
P207F on RAM vehicles indicates reductant quality performance. Au7o has documented this code across 1 RAM model — most commonly on 2500. This code applies to diesel vehicles with a Selective Catalytic Reduction (SCR) emissions system and means the quality of the diesel exhaust fluid (DEF, also called reductant or AdBlue) does not meet the required specification. The SCR system injects DEF into the exhaust to chemically neutralize nitrogen-oxide (NOx) pollutants, and the computer monitors NOx sensors and the DEF quality sensor to confirm the fluid is doing its job. When it concludes the reductant is contaminated, diluted, the wrong fluid, or not reducing emissions effectively, it sets this code. It generally indicates a DEF quality or SCR efficiency problem and often triggers reduced power or limited restarts to force the issue to be fixed. Typical repair costs on RAM range from $300 to $3,500, depending on the specific model and root cause.
Common Causes of P207F
- •Contaminated, diluted, or wrong fluid in the DEF tank (e.g., water or fuel)
- •Poor-quality or expired/degraded DEF
- •Faulty DEF quality sensor
- •Failing or clogged DEF (reductant) injector
- •Faulty NOx sensor(s)
- •DEF system or exhaust leaks
- •Aged or damaged SCR catalyst
P207F on RAM by Model
RAM 2500(1 issue)
- Diesel Exhaust Fluid (DEF) System Failures2013-2025
The 2013+ RAM 2500 6.7L Cummins diesel DEF (Diesel Exhaust Fluid) system is plagued with failures of the DEF heater, DEF pump, DEF injector, NOx sensors, and SCR catalyst. The DEF system is required for emissions compliance, and when it fails, the truck enters a "limp mode" that limits speed to 5 mph after a countdown timer expires. DEF heater failures are most common in cold climates where the fluid freezes and cracks the heater element. TSB 18-018-20 addresses DEF heater and quality sensor issues. The NOx sensors (inlet and outlet) fail frequently at $300-500 each.
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View P207F across all makes →Frequently Asked Questions
What does P207F mean on RAM?▼
P207F stands for "Reductant Quality Performance." This code applies to diesel vehicles with a Selective Catalytic Reduction (SCR) emissions system and means the quality of the diesel exhaust fluid (DEF, also called reductant or AdBlue) does not meet the required specification. The SCR system injects DEF into the exhaust to chemically neutralize nitrogen-oxide (NOx) pollutants, and the computer monitors NOx sensors and the DEF quality sensor to confirm the fluid is doing its job. When it concludes the reductant is contaminated, diluted, the wrong fluid, or not reducing emissions effectively, it sets this code. It generally indicates a DEF quality or SCR efficiency problem and often triggers reduced power or limited restarts to force the issue to be fixed. On RAM specifically, this code is documented across 1 model.
What causes P207F on RAM vehicles?▼
Common causes on RAM: Contaminated, diluted, or wrong fluid in the DEF tank (e.g., water or fuel), Poor-quality or expired/degraded DEF, Faulty DEF quality sensor, Failing or clogged DEF (reductant) injector, Faulty NOx sensor(s). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P207F on a RAM?▼
Repair costs on RAM range from $300 to $3,500, depending on the specific model and root cause.
Which RAM models have P207F documented?▼
Au7o has documented P207F on 1 RAM model: 2500.