P0037: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P0037 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

5 complaints filed with NHTSA mention P0037, 4 of them since 2015, across 5 different models. The component owners most often filed it under: service brakes.

Manufacturer service bulletins that name P0037

28 technical service bulletins and manufacturer communications filed with NHTSA mention P0037, from 9 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • CHRYSLER PACIFICA (2021), bulletin 10198455: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
  • INFINITI QX60 (2020), bulletin 10190191: 2020 QX60; MIL ON WITH DTC P0037 STORED IF YOU CONFIRM The MIL is ON and DTC P0037 (HO2S2 HEATER) is stored in the ECM. ACTION 1. Confirm the current ECM part number. 2. Reprogram the ECM, if applicable.
  • NISSAN PATHFINDER (2020), bulletin 10191981: 2020 PATHFINDER; MIL ON WITH DTC P0037 STORED IF YOU CONFIRM The MIL is ON and DTC P0037 (HO2S2 HEATER) is stored in the ECM. ACTION 1. Confirm the current ECM part number. 2. Reprogram the ECM, if applicable.
  • JAGUAR F-TYPE (2015, 2016), bulletin 10097084: "ISSUE: THE CUSTOMER MAY OBSERVE A MIL IN THE INSTRUMENT CLUSTER RELATING TO THE ENGINE SYSTEM (CHECK ENGINE LIGHT) AND ONE OR MORE CODES STORED IN THE PCM RELATING TO HEATED OXYGEN SENSOR (HO2S) IN THE EXHAUST SYSTEM. T…
  • LAND ROVER RANGE ROVER (2016), bulletin 10105881: "ISSUE: THE CUSTOMER MAY OBSERVE A MIL IN THE INSTRUMENT CLUSTER RELATING TO THE ENGINE SYSTEM (CHECK ENGINE LIGHT) AND ONE OR MORE CODES STORED IN THE PCM RELATING TO HEATED OXYGEN SENSOR (HO2S) IN THE EXHAUST SYSTEM. T…
  • JAGUAR XF (2013, 2014, 2015), bulletin 10096822: "SITUATION: THE ENGINE MALFUNCTION INDICATOR LAMP (MIL) MAY BE ILLUMINATED. UPON DIAGNOSIS, THE TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODES (DTC) RELEVANT TO THE MID-CATALYST AND POST-CATALYST HEATED OXYGEN SENSORS (HO2…

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.