Code result
P0145
O2 Sensor Circuit Slow Response
Moderate severity
What it means
The ECU detects an abnormally high voltage from the third O2 sensor on bank 1. Indicates persistently rich exhaust, a shorted sensor or wiring shorted to a voltage source.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Rich exhaust (leaking injector, high fuel pressure)
highOne of the most commonly reported causes for this code — check this first.
Signal wire shorted to voltage
mediumA plausible cause — test and verify before replacing parts.
O2 sensor failed
mediumA plausible cause — test and verify before replacing parts.
Related help
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