NOx Sensor Bank 1 Sensor 1 Circuit Performance
What does POWERSTROKE-P220B mean?
The POWERSTROKE-P220B (Power Stroke) diesel fault code means: NOx Sensor Bank 1 Sensor 1 Circuit Performance. This is a serious severity code.
Common Symptoms
- CEL
- Increased NOx warning
- Possible derate
Probable Causes (Ranked by Likelihood)
- Failed upstream NOx sensor Very Likely
- Wiring damage from exhaust heat Likely
- SCR system fouling causing sensor confusion Possible
Step-by-Step Diagnostic Procedure
Scan upstream and downstream NOx sensor ppm readings.
Compare to expected values at idle / cruise.
Replace failed sensor with OEM (aftermarket NOx sensors have high early-failure rate).
Frequently Asked Questions
What is P220B on a 6.7L Power Stroke (Scorpion)?
P220B on a 6.7L Power Stroke (Scorpion) (2011-present) indicates: NOx Sensor Bank 1 Sensor 1 Circuit Performance. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.
Can I drive with P220B on my Power Stroke?
Only drive short distances to get to a repair facility. Continued operation may cause further damage.
How much does it cost to fix P220B?
Repair cost is typically $400-$1,200 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.
P220B on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: