Block of codes
P22xx codes: NOx sensors, turbo and fuel pressure
This block brings together the codes from P2200 to P229F in the glossary. Open yours to see what it means, its causes and whether you can keep driving.
Reviewed by Daniel Morales, founder of Reprorace SL, on
What this block covers
Emission control
The catalytic converter, oxygen sensors, EGR, fuel vapor system (EVAP), particulate filter and NOx reduction clean the exhaust. A fault here raises pollution and may make the car fail its inspection; left alone, some end in a bigger fault or in limp-home mode.
Fuel and air metering
The engine measures the incoming air and meters the fuel so the mixture is right; the throttle, the accelerator pedal and the turbo are here too. A fault usually shows as higher fuel use, jerking, lack of power or hard starting.
The 98 codes of the block
- P2200NOx sensor (bank 1, sensor 1), circuit: malfunction
- P2201NOx sensor (bank 1, sensor 1), circuit: range/performance
- P2202NOx sensor (bank 1, sensor 1), circuit: signal low
- P2203NOx sensor (bank 1, sensor 1), circuit: signal high
- P2204NOx sensor (bank 1, sensor 1), circuit: intermittent
- P2205NOx sensor heater (bank 1, sensor 1), control circuit open
- P2206NOx sensor heater (bank 1, sensor 1), control circuit: signal low
- P2208NOx sensor heater (bank 1, sensor 1), sense circuit: malfunction
- P2209NOx sensor heater (bank 1, sensor 1), sense circuit: range/performance
- P2211NOx sensor heater (bank 1, sensor 1), sense circuit: signal high
- P2212NOx sensor heater (bank 1, sensor 1), sense circuit: intermittent
- P2213NOx sensor (bank 2), circuit: malfunction
- P2214NOx sensor (bank 2), circuit: range/performance
- P2215NOx sensor (bank 2), circuit: signal low
- P2216NOx sensor (bank 2), circuit: signal high
- P2217NOx sensor (bank 2), circuit: intermittent
- P2218NOx sensor heater (bank 2), control circuit open
- P2219NOx sensor heater (bank 2), control circuit: signal low
- P2220NOx sensor heater (bank 2), control circuit: signal high
- P2221NOx sensor heater (bank 2), sense circuit: malfunction
- P2222NOx sensor heater (bank 2), sense circuit: range/performance
- P2223NOx sensor heater (bank 2), sense circuit: signal low
- P2224NOx sensor heater (bank 2), sense circuit: signal high
- P2225NOx sensor heater (bank 2), sense circuit: intermittent
- P2226Barometric pressure sensor A, circuit: malfunction
- P2227Barometric pressure sensor A, circuit: range/performance
- P2228Barometric pressure sensor A, circuit: signal low
- P2229Barometric pressure sensor A, circuit: signal high
- P222ABarometric pressure sensor B, circuit: malfunction
- P222EBarometric pressure sensor B, circuit: intermittent/erratic
- P222FBarometric pressure sensor A/B: correlation fault
- P2230Barometric pressure sensor A, circuit: intermittent/erratic
- P2232O2 sensor (bank 1, sensor 2), signal circuit: shorted to heater circuit
- P2234O2 sensor (bank 2, sensor 1), signal circuit: shorted to heater circuit
- P2235O2 sensor (bank 2, sensor 2), signal circuit: shorted to heater circuit
- P2237O2 sensor positive current (bank 1, sensor 1), control circuit open
- P2238O2 sensor positive current (bank 1, sensor 1), control circuit: signal low
- P2239O2 sensor positive current (bank 1, sensor 1), control circuit: signal high
- P2240O2 sensor positive current (bank 2, sensor 1), control circuit open
- P2241O2 sensor positive current (bank 2, sensor 1), control circuit: signal low
- P2242O2 sensor positive current (bank 2, sensor 1), control circuit: signal high
- P2243O2 sensor (bank 1, sensor 1), reference voltage circuit open
- P2244O2 sensor reference voltage (bank 1, sensor 1): performance
- P2245O2 sensor (bank 1, sensor 1), reference voltage circuit: signal low
- P2246O2 sensor (bank 1, sensor 1), reference voltage circuit: signal high
- P2247O2 sensor (bank 2, sensor 1), reference voltage circuit open
- P2248O2 sensor reference voltage (bank 2, sensor 1): performance
- P2249O2 sensor (bank 2, sensor 1), reference voltage circuit: signal low
- P2250O2 sensor (bank 2, sensor 1), reference voltage circuit: signal high
- P2251O2 sensor negative current (bank 1, sensor 1), control circuit open
- P2252O2 sensor negative current (bank 1, sensor 1), control circuit: signal low
- P2253O2 sensor negative current (bank 1, sensor 1), control circuit: signal high
- P2254O2 sensor negative current (bank 2, sensor 1), control circuit open
- P2255O2 sensor negative current (bank 2, sensor 1), control circuit: signal low
- P2256O2 sensor negative current (bank 2, sensor 1), control circuit: signal high
- P2257AIR system control A, circuit: signal low
- P2258AIR system control A, circuit: signal high
- P2259AIR system control B, circuit: signal low
- P2260AIR system control B, circuit: signal high
- P2261Turbocharger/supercharger bypass valve A: mechanical fault
- P2262Turbocharger/supercharger boost pressure A: not detected - mechanical fault
- P2263Turbocharger/supercharger A boost system: performance
- P2264Water in fuel sensor A, circuit: malfunction
- P2265Water in fuel sensor A, circuit: range/performance
- P2266Water in fuel sensor A, circuit: signal low
- P2267Water in fuel sensor A, circuit: signal high
- P2268Water in fuel sensor A, circuit: intermittent
- P226AWater in fuel lamp, control circuit: malfunction
- P2270O2 sensor signal (bank 1, sensor 2): biased or stuck lean
- P2271O2 sensor signal (bank 1, sensor 2): biased or stuck rich
- P2272O2 sensor signal (bank 2, sensor 2): biased or stuck lean
- P2273O2 sensor signal (bank 2, sensor 2): biased or stuck rich
- P2279Intake air system (bank 1): leak
- P2280Air flow restriction or air leak between air filter and MAF sensor (bank 1)
- P2281Air leak between MAF sensor and throttle body
- P2282Air leak between throttle body and intake valves
- P2283Injector control pressure sensor, circuit: malfunction
- P2284Injector control pressure sensor, circuit: range/performance
- P2285Injector control pressure sensor, circuit: signal low
- P2286Injector control pressure sensor, circuit: signal high
- P2287Injector control pressure sensor, circuit: intermittent
- P2288Injector control pressure: too high
- P2289Injector control pressure: too high - engine off
- P228CFuel pressure regulator A: control limits exceeded - pressure too low
- P228FFuel pressure regulator A: learning limits exceeded - too high
- P2290Injector control pressure: too low
- P2291Injector control pressure: too low - during cranking
- P2292Injector control pressure: erratic
- P2293Fuel pressure regulator B: performance
- P2294Fuel pressure regulator B, control circuit open
- P2295Fuel pressure regulator B, control circuit: signal low
- P2296Fuel pressure regulator B, control circuit: signal high
- P2297O2 sensor (bank 1, sensor 1): out of range during deceleration
- P2298O2 sensor (bank 2, sensor 1): out of range during deceleration
- P2299Brake pedal position and accelerator pedal position incompatible
- P229AFuel pressure regulator B: control limits exceeded - pressure too low
- P229CFuel pressure regulator B: learning limits exceeded - too low
- P229FNOx sensor (bank 1, sensor 2), circuit: range/performance
Other blocks
Read your car's fault codes on your phone
With an ECO-LITE in the OBD socket you see the codes in your account, with the data captured when the fault happened, and your workshop can check them remotely, always with your permission.
Keep reading
- OBD fault codes: what each one means
- Check engine light on: what to do
- How to read and clear your car's fault codes
- Will your car pass its MOT or inspection with the engine light on?
- Wi-Fi OBD2 reader: which one to choose
- Reading fault codes by car make
- Remote OBD diagnostics: what it is, how it works and what it can't do
- Vehicle diagnostics glossary