P2201 on Ford
NOx Sensor Circuit Range/Performance (Bank 1)
P2201 on Ford vehicles indicates nox sensor circuit range/performance (bank 1). Au7o has documented this code across 1 Ford model — most commonly on Transit. This code means the engine computer detected that the NOx (nitrogen oxides) sensor signal on Bank 1 is out of its expected range or not performing correctly. The NOx sensor measures nitrogen oxide levels in the exhaust, mainly on diesel and lean-burn engines, to manage the emissions/SCR system. An implausible reading means the computer can't accurately monitor or control emissions. While not an immediate driving hazard, it can cause emissions faults, failed inspections, and in some vehicles reduced-power modes if the system can't verify proper operation. Typical repair costs on Ford range from $350 to $1,800, depending on the specific model and root cause.
Common Causes of P2201
- •Faulty NOx sensor
- •Wiring or connector problems at the NOx sensor
- •Exhaust leak near the sensor affecting readings
- •Contaminated or aged sensor element
- •DEF/SCR system performance issues skewing readings
- •NOx sensor control module fault
P2201 on Ford by Model
Ford Transit(1 issue)
- NOx Sensor / SCR DEF System Faults Causing Reduced Power (2.0L EcoBlue Diesel)2018-2023
EcoBlue diesel Transits have documented owner reports of check engine lights and emissions system warnings related to SCR/DEF operation, commonly tied to NOx sensor faults or SCR efficiency monitoring. When the system detects persistent faults, it may trigger reduced power or countdown-to-no-start strategies depending on market/calibration. These issues are frequently accompanied by emissions-related DTCs and can be intermittent before becoming persistent.
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View P2201 across all makes →Frequently Asked Questions
What does P2201 mean on Ford?▼
P2201 stands for "NOx Sensor Circuit Range/Performance (Bank 1)." This code means the engine computer detected that the NOx (nitrogen oxides) sensor signal on Bank 1 is out of its expected range or not performing correctly. The NOx sensor measures nitrogen oxide levels in the exhaust, mainly on diesel and lean-burn engines, to manage the emissions/SCR system. An implausible reading means the computer can't accurately monitor or control emissions. While not an immediate driving hazard, it can cause emissions faults, failed inspections, and in some vehicles reduced-power modes if the system can't verify proper operation. On Ford specifically, this code is documented across 1 model.
What causes P2201 on Ford vehicles?▼
Common causes on Ford: Faulty NOx sensor, Wiring or connector problems at the NOx sensor, Exhaust leak near the sensor affecting readings, Contaminated or aged sensor element, DEF/SCR system performance issues skewing readings. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2201 on a Ford?▼
Repair costs on Ford range from $350 to $1,800, depending on the specific model and root cause.
Which Ford models have P2201 documented?▼
Au7o has documented P2201 on 1 Ford model: Transit.