Error code
OBD2 P2249
OBD2P2249
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
O2 Sensor Reference Voltage Circuit Low.
Severity
moderateCan drive but may experience reduced fuel efficiency and emissions issues.
Summary
P2249 indicates that there is an issue with the reference voltage circuit of the heated oxygen sensor (HO2S) on bank 2, which could affect engine performance.
Common Causes
- Wiring short to ground
Fixes
- Inspect and repair the wiring related to the oxygen sensor on bank 2.
FAQ
What does P2249 mean?
P2249 indicates a problem with the reference voltage circuit of the heated oxygen sensor (HO2S) on engine bank 2.
How do I fix P2249?
The issue can be addressed by inspecting and repairing any wiring shorts to ground near the HO2S on bank 2.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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