P2200 on Mercedes-Benz
NOx Sensor Circuit Bank 1 Sensor 1
P2200 on Mercedes-Benz vehicles indicates nox sensor circuit bank 1 sensor 1. Au7o has documented this code across 2 Mercedes-Benz models — most commonly on GLE, V-Class. P2200 is a generic powertrain code indicating the engine control module (ECM) has detected a fault in the electrical circuit of the NOx (nitrogen oxide) sensor for Bank 1, Sensor 1. This sensor measures NOx concentration in the exhaust as part of the emissions aftertreatment system (typically SCR/DEF on diesels), and the code means the circuit is open, shorted, or producing an out-of-range signal. Typical repair costs on Mercedes-Benz range from $300 to $1,200, depending on the specific model and root cause.
Common Causes of P2200
- •Failed or contaminated NOx sensor (Bank 1, Sensor 1)
- •Open, shorted, or corroded wiring or connector in the NOx sensor circuit
- •Damaged or chafed harness exposed to exhaust heat
- •Loss of power or ground to the sensor
- •Failed NOx sensor control module
- •ECM/PCM software fault or, rarely, internal ECM failure
P2200 on Mercedes-Benz by Model
Mercedes-Benz GLE(1 issue)
- Diesel AdBlue / SCR NOx Sensor Fault Triggering Restart Countdown and No-Start2016-2024
On diesel GLEs, the SCR/AdBlue emissions system enforces compliance with a start countdown: when it detects a fault it warns 'You can restart the engine X more times,' and once the counter expires the car will not start until the fault is fixed and the counter is reset. The most common root cause is a failed upstream or downstream NOx sensor giving out-of-range readings; other causes are AdBlue crystallization, a blocked dosing valve, or low-quality fluid. Topping up AdBlue does NOT clear the countdown.
Mercedes-Benz V-Class(1 issue)
- AdBlue/SCR System Faults Triggering Limp Mode and No-Start Countdown2015-2020
On Euro 6 W447 diesels the SCR emissions system depends on NOx sensors (before and after the catalyst) and the AdBlue dosing system. A failed NOx sensor, dosing fault, or low/contaminated AdBlue escalates from a yellow warning to a red warning and finally a 'No start in X miles' countdown, after which the engine will not restart once switched off. The vehicle commonly drops into limp mode (restricted speed/power) before that. NOx sensor failure is one of the most frequently cited W447 emissions faults.
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View P2200 across all makes →Frequently Asked Questions
What does P2200 mean on Mercedes-Benz?▼
P2200 stands for "NOx Sensor Circuit Bank 1 Sensor 1." P2200 is a generic powertrain code indicating the engine control module (ECM) has detected a fault in the electrical circuit of the NOx (nitrogen oxide) sensor for Bank 1, Sensor 1. This sensor measures NOx concentration in the exhaust as part of the emissions aftertreatment system (typically SCR/DEF on diesels), and the code means the circuit is open, shorted, or producing an out-of-range signal. On Mercedes-Benz specifically, this code is documented across 2 models.
What causes P2200 on Mercedes-Benz vehicles?▼
Common causes on Mercedes-Benz: Failed or contaminated NOx sensor (Bank 1, Sensor 1), Open, shorted, or corroded wiring or connector in the NOx sensor circuit, Damaged or chafed harness exposed to exhaust heat, Loss of power or ground to the sensor, Failed NOx sensor control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2200 on a Mercedes-Benz?▼
Repair costs on Mercedes-Benz range from $300 to $1,200, depending on the specific model and root cause.
Which Mercedes-Benz models have P2200 documented?▼
Au7o has documented P2200 on 2 Mercedes-Benz models: GLE, V-Class.