P2200: How to Diagnose & Fix — NOx Sensor Circuit Bank 1 Sensor 1
3 vehicles · 2 makes · $300-$1,200 repair
How to diagnose and fix P2200: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Volvo V60 · 2016–2021
On AdBlue/SCR-equipped diesel V60s, faults in the NOx sensors and AdBlue dosing system are common. A drifting or failed NOx sensor makes the system believe the SCR catalyst is not reducing emissions, throwing AdBlue/dosing warnings and limp mode. Critically, persistent NOx/SCR faults trigger an emissions 'start-prevented' countdown that, if ignored, will refuse to restart the engine. Air trapped in the dosing line, a faulty dosing valve/module, or contaminated AdBlue can produce the same symptoms.
Common Symptoms
- AdBlue / emissions warning with no-start countdown
- Limp mode and reduced power
- AdBlue dosing service required message
- NOx sensor circuit fault codes
- Increased AdBlue consumption
How to Fix
Scan for specific NOx/SCR codes (do not rely on the generic AdBlue message). Replace the failed upstream or downstream NOx sensor or the AdBlue dosing module/valve as indicated, prime/bleed air from the dosing system, use only fresh, uncontaminated DEF, and clear the fault and reset the SCR system with a diagnostic tool to cancel the no-start countdown. Verify live sensor data makes sense before returning the car to service.
Sources for this issue (2)
Mercedes-Benz GLE · 2016–2024
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.
Common Symptoms
- 'Start engine X more times' AdBlue countdown warning
- 'Check AdBlue / see owner's manual' message
- No-start after countdown expires
- Check-engine light with NOx/SCR codes
- Reduced power / limp mode
How to Fix
Scan with XENTRY/compatible tool and read live NOx sensor, dosing, and SCR temperature data to pinpoint the failed component. Replace the faulty NOx sensor — OM642/OM651-era downstream sensor is part number 0009058611 (also 000905350364 for the pre-SCR sensor); newer OM654/OM656 diesels use NOx sensor 000-905-48-07 (0009054807). Then have the SCR no-start counter reset (requires dealer/specialist software; it will not clear on its own). NOx sensor part ~$150-350; diagnosis + sensor + reset typically $400-1,200.
Sources for this issue (2)
Mercedes-Benz V-Class · 2015–2020
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.
Common Symptoms
- AdBlue warning light (yellow then red)
- 'No start in 500 miles' / engine-start countdown message
- Limp mode with reduced power
- Repeated emissions warnings after a basic code clear
How to Fix
Diagnose the specific fault: replace the failed NOx sensor (genuine/OE recommended) or repair the AdBlue dosing/heater/pump as required, top up with fresh AdBlue, then clear codes and reset the SCR warning scenario (e.g. 'Reset SCR Warnszenario'/soft reset in dealer-level diagnostics). Simply clearing codes without fixing the root cause makes the warning return.
Sources for this issue (3)
Find P2200 by make
Browse every documented model and issue for your make.
P2200 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2200 mean?
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.
What are the most common causes of P2200?
The most common causes of P2200 are: 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. The specific cause varies by vehicle.
How much does it cost to fix P2200?
Repair costs for P2200 range from $300 to $1,200, depending on the vehicle and root cause.
Which vehicles are affected by P2200?
Au7o has documented P2200 across 3 vehicle models from 2 manufacturers: Mercedes-Benz, Volvo.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.