OBD-II code · Powertrain (generic, extended)
P2252 O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 1)
The negative-current (Vs negative) line on the bank 1, sensor 1 wide-band oxygen sensor is below the lower threshold. This line is the return path for the Nernst cell; loss of the signal blocks the lambda calculation.
Is it safe to drive with P2252?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyVs negative line shorted to ground
- PossibleNernst cell return open inside sensor
- Less likelyConnector pins corroded - high contact resistance
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 Upstream, Oxygen Sensor Wiring
Related codes
- P2254O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 1)
- P22B3O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 2)
- P22C0O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 2)
- P224FAlternative Fuel Tank Shutoff Valve A Control Circuit High
- P2250O2 Sensor Reference Voltage Circuit High (Bank 2 Sensor 1)
- P2251O2 Sensor Negative Current Control Circuit (Bank 1 Sensor 1)
- P2253O2 Sensor Negative Current Control Circuit High (Bank 1 Sensor 1)
- P2255O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.