The Lemon IndexThe downstream O2 sensor heater circuit reads too low.
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
Failed O2 sensor heater. Then: wiring fault.
Owners named P0037 in 5 complaints to the U.S. government, most often on the Lexus.
The details
What P0037 means
The downstream O2 sensor heater circuit reads too low.
Can I drive with P0037?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
40% of the owner complaints that name P0037 also say the car brakes or ABS act up. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0037
- Failed O2 sensor heater
- Wiring fault
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Brakes or ABS act up: 40% of complaints
Share of complaints naming the code whose text also mentions each problem.
Related codes
P0031 P0030 P0024 P0022 P0021 P0019 P0018 P0017
Quick answers
What does P0037 mean?
HO2S Heater Control Circuit Low (Bank 1 Sensor 2). The downstream O2 sensor heater circuit reads too low.
Can I drive with P0037?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
What causes P0037?
Failed O2 sensor heater; Wiring fault.
Counts: NHTSA owner complaints whose text names P0037. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.