Error code

OBD2 P0145

OBD2P0145
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

O2 Sensor Circuit Slow OBDResponse.

Severity

moderateCan be driven, but performance and fuel economy may suffer.

Summary

Code P0145 indicates a slow response from the heated oxygen sensor (HO2S) located downstream of the catalytic converter on bank 1, sensor 3. This can affect the monitoring of the catalytic converter's efficiency.

Symptoms

  • Stored trouble code
  • Rich or lean running conditions
  • Reduced fuel economy
  • Engine hesitation or stumbling upon acceleration
  • Rough idling

Common Causes

  • Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors
  • Open circuits
  • Blown fuses (where applicable)
  • Defective oxygen sensors
  • Heavily fouled or contaminated oxygen sensors

Diagnosis

  1. Check for other codes and ensure the engine is in perfect running condition.
  2. Inspect wiring and connectors for damage or corrosion.
  3. Monitor live data streams to check sensor temperature and signal voltage.
  4. Perform reference, input, resistance, ground, and continuity tests on wiring.
  5. Test oxygen sensor resistance and inspect for discoloration or deposits.

Fixes

  • Replace damaged wiring or connectors.
  • Replace faulty oxygen sensors.

FAQ

What does P0145 mean?

P0145 indicates a slow response from the heated oxygen sensor (HO2S) located downstream of the catalytic converter on bank 1, sensor 3.

How do I diagnose P0145?

Diagnose by checking wiring and connectors for damage, monitoring live data streams, performing electrical tests, and inspecting oxygen sensors.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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