P209B
Reductant Injection Air Pressure Sensor B Circuit Range/Performance
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$33–89 (est.)
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Problems starting the engine
- Changes in the operation of the SCR system
Causes
- Air pressure sensor B fault
- Open or short circuit in the sensor circuit
- Connector problems or contact corrosion
- SCR control module malfunction
- Contamination or damage to system air lines
How to Fix
- Diagnose the sensor circuit using a scanner
- Check the integrity of the wiring and connector contacts
- Test the air pressure sensor with a multimeter
- If necessary, replace the sensor or repair the wiring
- Reset fault code after repair
Related codes
Error P209B by Vehicle Brand
AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye