P2202 on Opel
NOx Sensor Circuit Low Voltage (Bank 1, Sensor 1)
P2202 on Opel vehicles indicates nox sensor circuit low voltage (bank 1, sensor 1). Au7o has documented this code across 1 Opel model — most commonly on Grandland. The PCM has detected that the signal voltage from the NOx (nitrogen oxide) sensor on Bank 1, Sensor 1 is lower than the expected operating range. The NOx sensor measures nitrogen-oxide content in the exhaust to manage the aftertreatment system (SCR/DEF on diesels or lean-burn emission control), so a low-voltage fault means the engine controller can no longer trust that reading. This is primarily a diesel and lean-burn emissions code and typically triggers reduced-emissions or limp-mode behavior. Typical repair costs on Opel range from $250 to $1,200, depending on the specific model and root cause.
Common Causes of P2202
- •Failed or contaminated NOx sensor element (Bank 1, Sensor 1)
- •Short to ground or low resistance in the NOx sensor signal or supply wiring
- •Corroded, loose, or damaged sensor connector / pins
- •Open or high-resistance ground or reference circuit causing low signal
- •Exhaust leak or soot/sulfur contamination affecting the sensor
- •Faulty NOx sensor control module or PCM/ECM (less common)
P2202 on Opel by Model
Opel Grandland(1 issue)
- Diesel SCR/AdBlue & NOx Sensor Emissions Fault with 'Starting Impossible' Limp Mode2017-2023
Diesel Grandland X models (1.5 BlueHDi/1.6 diesel with SCR after-treatment) frequently throw exhaust after-treatment faults. Owners see emissions warnings, reduced power/limp mode, and the countdown message 'Engine start prevented in XXX miles/km'. Common root causes are NOx sensor failure (range/performance faults), SCR system or AdBlue injector/pump faults, crystallised AdBlue, or poor-quality urea. If ignored, the car eventually refuses to start. Critical phase is commonly around 30,000-45,000 km.
Looking for P2202 on a different make?
View P2202 across all makes →Frequently Asked Questions
What does P2202 mean on Opel?▼
P2202 stands for "NOx Sensor Circuit Low Voltage (Bank 1, Sensor 1)." The PCM has detected that the signal voltage from the NOx (nitrogen oxide) sensor on Bank 1, Sensor 1 is lower than the expected operating range. The NOx sensor measures nitrogen-oxide content in the exhaust to manage the aftertreatment system (SCR/DEF on diesels or lean-burn emission control), so a low-voltage fault means the engine controller can no longer trust that reading. This is primarily a diesel and lean-burn emissions code and typically triggers reduced-emissions or limp-mode behavior. On Opel specifically, this code is documented across 1 model.
What causes P2202 on Opel vehicles?▼
Common causes on Opel: Failed or contaminated NOx sensor element (Bank 1, Sensor 1), Short to ground or low resistance in the NOx sensor signal or supply wiring, Corroded, loose, or damaged sensor connector / pins, Open or high-resistance ground or reference circuit causing low signal, Exhaust leak or soot/sulfur contamination affecting the sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2202 on a Opel?▼
Repair costs on Opel range from $250 to $1,200, depending on the specific model and root cause.
Which Opel models have P2202 documented?▼
Au7o has documented P2202 on 1 Opel model: Grandland.