enbgde
P2414 Generic (SAE) Basic entry

O2 Sensor Exhaust Sample Error

Updated 2026-10-02 · Fuel, air & emissions (P2)

Severity
Medium
Typical repair cost
40 – 350 EUR
System
Powertrain

What it means

P2414 is a general fault for the O2 Sensor Exhaust Sample circuit: the engine control module has detected a condition it cannot classify as low, high or open, often because the fault changes during the test.

This entry is compiled automatically from the standard definition and typical diagnostic practice for this type of fault. A detailed, reviewed article is in preparation.

Advertisement728 × 90

Symptoms

  • Check engine light on
  • Rough or unstable idle
  • Hesitation or poor acceleration
  • Increased fuel consumption
  • Possible limp mode with reduced power

Common causes

  1. Damaged, chafed or corroded wiring in the O2 Sensor Exhaust Sample circuit
  2. Corroded, loose or water-damaged connector terminals
  3. Failed O2 Sensor Exhaust Sample component (sensor, solenoid or actuator)
  4. Poor ground connection for the module or component
  5. Faulty control module driver (rare, confirm all else first)

How to diagnose

  1. Read freeze frame data and note when the code set (cold start, under load, after rain)
  2. Inspect the O2 Sensor Exhaust Sample connector for bent pins, corrosion and water; wiggle the harness with the engine running and watch live data
  3. Measure supply voltage and ground at the connector with the key on
  4. Check the signal wire for shorts to ground or battery and for continuity to the control module
  5. Test or substitute the O2 Sensor Exhaust Sample only after wiring and connectors are confirmed good
  6. Clear the code and complete a drive cycle to confirm the repair

Frequently asked questions

Can I keep driving with P2414?

Usually yes for a short time, but expect reduced performance or higher fuel use. Have it diagnosed within a few days.

Will clearing P2414 fix it?

No. Clearing only erases the stored code; it returns as soon as the monitor runs again unless the cause is repaired.

Related codes

P2415

Nearby codes in this group