OBD-II code · Powertrain (generic, extended)
P2240 O2 Sensor Pumping Current Circuit (Bank 2 Sensor 1)
Bank 2 counterpart of P2237. The wide-band lambda sensor on bank 2 sensor 1 cannot operate its pumping current circuit.
Is it safe to drive with P2240?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyPumping current line open on bank 2
- PossibleBank 2 wide-band sensor failed
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oxygen Sensor Wideband, Oxygen Sensor Wiring
Related codes
- P2237O2 Sensor Pumping Current Circuit (Bank 1 Sensor 1)
- P223DO2 Sensor Pumping Current Range/Performance (Bank 2)
- P223EO2 Sensor Reference Resistance Out Of Range (Bank 1)
- P223FO2 Sensor Reference Resistance Out Of Range (Bank 2)
- P2241O2 Sensor Pumping Current Circuit Low (Bank 2 Sensor 1)
- P2242O2 Sensor Pumping Current Circuit High (Bank 2 Sensor 1)
- P2243O2 Sensor Reference Voltage Circuit (Bank 1 Sensor 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.