Free API
Back to 2023 Chevrolet Bolt EUV
Help
2023 CHEVROLET BOLT EUV
65 kWh Single Motor FWD•FWD•AUTOMATIC•ev
🏆Sponsored by Simon-Olivier Ricci
Repairs269Labor314Torque3680Fluid5DTC1608Battery1Maintenance0Recalls0
P0035low severityPowertrain

HO2S Heater Control Circuit High (Bank 1 Sensor 2)

on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD

What this code means

The heater circuit for the downstream oxygen sensor on bank 1 is reading high voltage or an open condition. This slows sensor warm-up and can affect fuel trim readiness.

Symptoms

  • Check engine light on
  • Failed emissions readiness
  • Slightly reduced fuel economy

Common causes

  • Faulty O2 sensor heater element
  • Blown heater fuse
  • Wiring or connector damage
  • Failed PCM driver

Diagnostic steps

  1. Scan and confirm code with freeze frame
  2. Check O2 sensor heater fuse
  3. Measure heater circuit resistance and voltage
  4. Inspect wiring and connectors to sensor
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITE
Shop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Other Powertrain codes on this vehicle

🔌 Need this data in your app? It's all in the free API →
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
Share:XRedditFBWhatsAppThreadsEmail
🔓 LIBERATED FOREVER
The 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD repair data is free for every DIYer and shop on earth, permanently, because Simon-Olivier Ricci paid $99 to unlock it.
Mitchell1 charges $169/mo for this. ALLDATAdiy charges $30/yr per vehicle. Open Labor Project is free permanently, because of community sponsors like Simon-Olivier.
Free another vehicle →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →