P0037
HO2S Heater Control Circuit Low Bank 1 Sensor 2
2018-2025 Fiat Cronos 1.3L I4 Flex Firefly
Low SeverityPowertrainGeneric (SAE)
Description
The voltage in the Bank 1 Sensor 2 O2 heater circuit is lower than expected.
Symptoms
- Check Engine Light
- Poor catalyst monitoring
Common Causes
- Short to ground
- Faulty sensor
- Corroded connector
Diagnostic Steps
- Test heater voltage
- Check for shorts
- Test resistance
Repair Notes
Repair wiring or replace sensor.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0037 on Other Vehicles
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 126p Maluch
1973-2000 0.65L I2 Air-Cooled
Fiat 126p Maluch
1987-2000 0.7L I2 Air-Cooled
Fiat 500
2012-2019 1.4L I4
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.0L I3 Hybrid FireFly 70
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Common Questions
What does code P0037 mean on a 2018-2025 Fiat Cronos?
P0037 stands for "HO2S Heater Control Circuit Low Bank 1 Sensor 2". The voltage in the Bank 1 Sensor 2 O2 heater circuit is lower than expected.
What are the symptoms of P0037 on a Fiat Cronos?
Common symptoms of P0037 include: Check Engine Light, Poor catalyst monitoring.
What causes P0037 on a 2018-2025 Fiat Cronos?
Common causes of P0037 include: Short to ground, Faulty sensor, Corroded connector.