Error code

OBD2 P2240

OBD2P2240
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

O2 Sensor Positive Current Control Circuit/Open.

Severity

moderateCan be driven but may cause increased emissions and reduced fuel efficiency.

Summary

Code P2240 indicates an open circuit or no signal in the positive current control of the heated oxygen sensor (HO2S) #1 on bank 2 of V-type engines, typically located upstream of the catalytic converter.

Common Causes

  • Damaged, burnt, shorted, disconnected, or corroded wiring and/or electrical connectors
  • Defective oxygen sensor
  • Faulty control relay
  • Exhaust leaks upstream of the catalytic converter

Diagnosis

  1. Inspect wiring between the oxygen sensor and control relay for damage or corrosion.
  2. Check for exhaust leaks upstream of the catalytic converter.
  3. Test the oxygen sensor for functionality.
  4. Verify operation of the control relay.

Fixes

  • Repair damaged wiring or replace faulty electrical connectors.
  • Replace a defective oxygen sensor if necessary.
  • Install a new control relay if it is found to be faulty.

FAQ

What does P2240 mean?

P2240 indicates an issue with the positive current control circuit of the oxygen sensor on bank 2, typically due to wiring problems or a faulty relay.

Is it safe to drive with P2240?

It is generally drivable but may lead to increased emissions and reduced fuel efficiency. It's recommended to address the issue promptly.

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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