BMW DTC P22FF – SCR NOx Catalyst Inlet Temperature Too Low
DTC P22FF meaning on BMW
DTC P22FF on a BMW indicates that the Selective Catalytic Reduction (SCR) system’s Nitrogen Oxide (NOx) Catalyst Inlet Temperature is too low. This fault code is triggered when the temperature of the SCR catalyst inlet falls below the specified threshold.
BMW DTC P22FF symptoms
Symptoms of DTC P22FF on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Possible increase in emissions
BMW DTC P22FF causes
Common causes of DTC P22FF on a BMW include:
- Malfunctioning NOx sensor
- Issues with the SCR system components
- Excessive soot or carbon buildup in the system
- Electrical faults in the system
BMW DTC P22FF seriousness
DTC P22FF should not be ignored as it can lead to increased emissions and potential damage to the SCR system. Continued driving with this fault may result in the vehicle failing emissions tests and could potentially harm the environment.
How to diagnose DTC P22FF on BMW
To diagnose DTC P22FF on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the NOx sensor and wiring for any visible damage
- Check the SCR system components for proper operation
- Measure the temperature at the SCR catalyst inlet
How to fix DTC P22FF on BMW
To fix DTC P22FF on a BMW, the following steps may be taken:
- Replace the faulty NOx sensor if found defective
- Clean or replace the SCR system components as necessary
- Clear any soot or carbon buildup in the system
- Repair any electrical faults in the system
How to erase DTC P22FF on BMW
After fixing the underlying issue causing DTC P22FF on a BMW, the fault code can be erased using a diagnostic scanner. This will reset the Check Engine Light and clear the code from the vehicle’s memory.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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