What Does P2569 Mean?
The PCM has detected an abnormally low voltage signal from the Direct Ozone Reduction catalyst temperature sensor circuit. This indicates either a circuit fault with a short to ground or a failed sensor producing insufficient voltage output.
Common Causes
35%
Short to ground in sensor wiring harness
30%
Failed temperature sensor with internal short
20%
Damaged or corroded sensor connector causing ground short
10%
Chafed wiring against exhaust or chassis components
5%
Water intrusion in sensor or connector
Diagnostic Steps
1
Step 1: Disconnect temperature sensor and measure voltage at PCM side of harness connector
2
Step 2: Check sensor signal wire for short to ground using ohmmeter with sensor disconnected
3
Step 3: Inspect sensor and connector for physical damage, corrosion, or moisture
4
Step 4: Measure sensor resistance and compare to cold engine specification
5
Step 5: Examine wiring routing for contact with hot exhaust components or sharp edges
Estimated Repair Cost
$120 - $450
Parts + labor, varies by vehicle and location
The PCM has detected an abnormally low voltage signal from the Direct Ozone Reduction catalyst temperature sensor circuit. This indicates either a circuit fault with a short to ground or a failed sensor producing insufficient voltage output.
The most common cause of P2569 (Direct Ozone Reduction Catalyst Temperature Sensor Circuit Low) is: Short to ground in sensor wiring harness
Typical repair costs for P2569 range from $120 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No immediate safety concerns. Vehicle is safe to operate but emissions system monitoring is compromised and may trigger check engine light.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2569 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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