Skip the auto shop - Our mechanics make house calls

P2568 OBD-II Trouble Code: Direct O-Zone Reduction Catalyst Temperature Sensor Circuit Range/Performance

Check Engine Light

P2568 code definition

Direct O-zone Reduction Catalyst Temperature Sensor Circuit Range/Performance

What the P2568 code means

P2568 is an OBD-II generic code that the engine control module (ECM) has detected the engine o-zone reduction catalyst temperature sensor to be out of specification range or performance has gone out of specification parameters.

What causes the P2568 code?

  • The ECM monitors the catalyst temperature with a sensor mounted in the exhaust after the catalyst.
  • The catalyst temperature sensor is inoperative or is slow in response to exhaust temperature.
  • The exhaust may have air leaks into the exhaust before the sensor causing incorrect operation.

What are the symptoms of the P2568 code?

  • The Check Engine Light will be illuminated and the code is set in ECM memory.
  • The engine may have an exhaust leak.
  • The sensor may not cause any drive complaints.

How does a mechanic diagnose the P2568 code?

  • Scans codes and documents the freeze frame data in order to verify the problem

  • Clears the engine codes and road tests the vehicle to verify concern comes back

  • Monitors the sensor PID on a scanner to see if sensor indicates the proper temperature of the exhaust as per specifications

  • Checks the sensor for damage to the sensor or wiring

Common mistakes when diagnosing the P2568 code?

  • Failing to repair any exhaust leaks or damage causing the sensor performance to be out of specifications

  • Failing to check the wiring harness and connection to the sensor for problems before replacing the sensor or catalyst

How serious is the P2568 code?

  • The Check Engine Light being on causes the vehicle to fail emission testing.

  • The sensor system for the catalyst temperature is important to keep from overheating the catalyst and causing damage to the catalyst.

What repairs can fix the P2568 code?

  • Replacing the o-zone reduction catalyst temperature sensor
  • Replacing the catalyst if damaged from over temperature conditions
  • Repairing the wiring shorted or open to the sensor or connector

Additional comments for consideration regarding the P2568 code

Code P2568 is triggered when the catalyst temperature sensor is out of specifications and can cause the catalyst to be overheated and damaged. When repairing the temperature sensor, check the catalyst for damage from overheating by looking at the catalyst housing for large discoloration or heat damage.

Need help with a P2568 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...


Related questions

Q: Transmission P0932 error code in fiat bravo 120 tjet

This is a code related to the hydraulic pressure sensor in the transmission. As you may know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission solenoid,...

Q: How to find out why the engine light is on without a scan tool

Not really. You will need to have the codes scanned on the engine's computer unless you are experiencing some really overt and obvious symptoms. If you want a mechanic to fix it, a technician from YourMechanic can come to your...

Q: Fuel System?

A whirring noise is actually a common symptom of a failing fuel pump. You can rule the power steering pump in or out just by disconnecting power steering belt. Obviously, if the noise remains the same with pump disconnected, then...