Catalyst Temperature Sensor Circuit Bank 2 Intermittent (Generic)
The P4023 code means the vehicle's onboard diagnostic system has detected: Catalyst Temperature Sensor Circuit Bank 2 Intermittent (Generic). This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $120 - $450 (parts and labor)
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Common Symptoms
- Check Engine Light intermittent
- Sporadic bank 2 power limitations
- Inconsistent catalyst monitoring
- Occasional service warnings
Probable Causes (Ranked by Likelihood)
- Loose bank 2 catalyst sensor connector Very High
- Wiring vibration damage on bank 2 High
- Thermal fatigue of connector Moderate
- Intermittent ground issue Low
Step-by-Step Diagnostic Procedure
-
Wiggle test bank 2 sensor connector while monitoring data
-
Inspect wiring on bank 2 for chafe points
-
Check connector pins for thermal damage
-
Review freeze frame data for conditions
Frequently Asked Questions
Why does P4023 appear intermittently?
The connector near the bank 2 catalytic converter experiences extreme heat cycling and vibration, causing intermittent contact over time.
Should I repair or replace the wiring?
If the wiring is chafed or heat damaged, replace the affected section. If the connector is the issue, repair or replace the connector.
Can I drive with P4023?
You can drive short distances. The intermittent nature means the system works most of the time, but address it before it becomes permanent.
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