P2196 — O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)
Category: Powertrain Severity: Medium
Updated:
DTC code P2196 means: O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include failed or contaminated O2 sensor, leaking injector and high fuel pressure; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Failed or contaminated O2 sensor
- Leaking injector
- High fuel pressure
- Purge valve stuck open
Symptoms
- Check engine light
- Fuel smell
- Higher fuel consumption
How to diagnose it step by step
- Read fuel trims.
- Test the purge valve.
- Check injectors and pressure.
- Replace the sensor if needed.
How to fix it
Confirm whether the mixture is really rich. If trims are normal, the sensor is the cause.
Estimated repair cost
$100–400.
Frequently asked questions
What does DTC code P2196 mean?
O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1).
Is code P2196 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P2196?
Yes, short term.
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