What Does P2568 Mean?
The PCM has determined that the Direct Ozone Reduction catalyst temperature sensor is reading values that are implausible or inconsistent with other engine parameters. The sensor may be functioning but providing inaccurate readings.
Common Causes
35%
Degraded or contaminated temperature sensor providing inaccurate readings
25%
Exhaust leak near sensor affecting temperature readings
20%
Failing Direct Ozone Reduction catalyst not generating expected temperatures
15%
High resistance in sensor circuit causing voltage drop
5%
Incorrect sensor specification or calibration issue
Diagnostic Steps
1
Step 1: Monitor temperature sensor readings during full warm-up cycle and compare to other exhaust temperature sensors
2
Step 2: Inspect exhaust system around sensor for leaks, damage, or missing heat shields
3
Step 3: Compare sensor response time to expected values during engine start and acceleration
4
Step 4: Check for excessive resistance in sensor circuit wiring and connections
5
Step 5: Evaluate catalyst efficiency using upstream/downstream oxygen sensor data if available
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The PCM has determined that the Direct Ozone Reduction catalyst temperature sensor is reading values that are implausible or inconsistent with other engine parameters. The sensor may be functioning but providing inaccurate readings.
The most common cause of P2568 (Direct Ozone Reduction Catalyst Temperature Sensor Circuit Range/Performance) is: Degraded or contaminated temperature sensor providing inaccurate readings
Typical repair costs for P2568 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No safety risk to occupants. Vehicle is safe to drive but emissions performance may be compromised leading to increased pollutant output.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2568 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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