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P0037 on Nissan: Causes, Symptoms and Fix Cost

Quick Answer

Safe to drive (short-term)

P0037 on a Nissan means the engine computer measured too little current or too low a voltage in the heater circuit of the downstream oxygen sensor on bank 1, the one after the catalytic converter. That is what a burned-out heater, a blown fuse or a broken supply wire produces. The sensor only checks the converter, so the car usually drives exactly as before. A new downstream sensor typically costs about 110 to 270 EUR fitted.

Severity
Low · Emissions
Typical repair cost, all makes
€1-€370

Connect a standard OBD2 adapter (Bluetooth LE on iPhone) to your Nissan and Skanyx tells you what P0037 means on that engine, whether it is safe to keep driving, and what the fix should cost. Free on iPhone and Android.

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What does P0037 mean on a Nissan?

The Quick Answer above is the generic definition. What follows is the model-specific detail for the Nissan models that log P0037.

Nissan Juke (HR16DE/MR16DDT)

2010-2019

Nissan's confirmation test for P0037 on the Juke (both the 1.6 HR16DE and the 1.6 DIG-T MR16DDT) holds the warm engine at 3,500-4,000 rpm for at least a minute without load and then idles it for a minute. Short town trips after a repair may therefore not re-run the check, so the light staying off for a day or two does not yet prove the fix.

Source: nijutech.com, nijutech.com, en.wikipedia.org

Nissan 350Z (VQ35HR)

2007-2009

The VQ35HR V6 in the later 350Z has a heated oxygen sensor after each bank's catalytic converter, and P0057 is the same fault on bank 2. Nissan's manual gives the heater resistance as 3.4-4.4 ohms at 25 C, lists a 15 A fuse in the supply, and switches this heater on only below 3,600 rpm once the engine is warm.

Source: 350z.se, en.wikipedia.org

Sources

  1. nijutech.com nijutech.com/p0037_p0038_ho2s2_heater-861.html
  2. nijutech.com nijutech.com/p0037_p0038_ho2s2_heater-725.html
  3. en.wikipedia.org en.wikipedia.org/wiki/Nissan_Juke
  4. 350z.se 350z.se/fsm/coupe/2007/ec.pdf
  5. en.wikipedia.org en.wikipedia.org/wiki/Nissan_350Z

What causes P0037 on a Nissan?

Beyond the generic causes listed on the main P0037 page, these are the patterns noted for Nissan models:

  • Burned-out heater in the downstream heated oxygen sensor

    : Nissan Juke (HR16DE/MR16DDT)

  • Open or shorted harness between the sensor, its fuse and the engine computer

    : Nissan Juke (HR16DE/MR16DDT)

  • Burned-out heater in the bank 1 downstream sensor

    : Nissan 350Z (VQ35HR)

  • Blown 15 A heater fuse or an open in the supply harness

    : Nissan 350Z (VQ35HR)

How to diagnose P0037 on a Nissan with OBD2

  1. Read all stored codes and freeze frame. P0037 together with P0031, P0057 or other heater codes points to a shared fuse, relay or supply wire rather than several failed sensors
  2. Check the oxygen sensor heater fuse named in the owner's manual or on the fuse box lid. Replace it if blown, and if it blows again look for a short in the heater or its wiring
  3. Raise the car safely, unplug the Bank 1 Sensor 2 connector and measure the resistance across the two heater pins. Many downstream sensors read between about 3 and 15 ohms at room temperature; check your car's specification. An open circuit means the heater has burned out
  4. With the key on, check for battery voltage on the heater supply pin on the harness side of the connector. No voltage points to the fuse, relay or supply wire
  5. Inspect the connector and the wiring along the exhaust and underbody for corrosion, pushed-back pins, melted insulation or chafing, and repair as needed
  6. After the repair, clear the code and drive a mix of town and steady faster driving. With a generic OBD2 reader, check that the oxygen sensor heater and catalyst readiness monitors complete before an inspection

How much does P0037 cost to fix on a Nissan? (EUR)

Estimated repair costs for P0037 in EUR, compiled across makes. Nissan costs typically sit in the middle of each range.

Repair Parts Cost Labor Cost Total Estimate DIY Difficulty
Replace O2 sensor heater fuse €1–€3 €0–€0 €1–€3 Easy
Replace O2 sensor heater relay €10–€40 €20–€60 €30–€100 Easy
Repair wiring or connector €5–€20 €40–€120 €45–€140 Moderate
Replace downstream O2 sensor (Bank 1) €50–€150 €60–€120 €110–€270 Moderate
Replace downstream O2 sensor (OEM quality) €80–€250 €60–€120 €140–€370 Moderate

Prices estimated as of October 2026. Costs vary by region, vehicle, and shop.

These codes are often seen alongside P0037 or point to related issues, on any make:

Looking for the full P0037 reference (all makes, full diagnosis flow, complete repair cost matrix)? See the main P0037 guide

Diagnose P0037 on your Nissan

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