The P246A: Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 3 code indicates that the exhaust gas temperature sensor for Bank 2 Sensor 3 is sending an intermittent or erratic signal. This issue could be caused by a faulty sensor, wiring issues, or connector problems, leading to incorrect temperature readings that can negatively impact the emission control system, including the DPF regeneration process.
P246A – Quick Overview
Code | Information |
---|---|
Meaning | P246A: Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 3 |
Is it serious? | Moderate – intermittent sensor signals can lead to improper exhaust and emissions management, impacting DPF regeneration and increasing emissions. |
Possible causes | – Intermittent or erratic signal in the exhaust gas temperature sensor circuit for Bank 2 Sensor 3 – Faulty sensor – Wiring or connector issues |
How to diagnose? | – Check for intermittent or erratic issues in the exhaust gas temperature sensor circuit for Bank 2 Sensor 3 – Inspect wiring and connectors – Replace faulty sensor if needed |
P246A Meaning
The P246A: Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 3 code means that the exhaust gas temperature sensor for Bank 2 Sensor 3 is providing an inconsistent or erratic signal to the vehicle’s ECU. This can occur due to poor electrical connections, a degraded sensor, or wiring issues, which can cause fluctuating readings. Such issues could prevent the diesel particulate filter (DPF) from undergoing proper regeneration, thereby causing increased emissions and potential engine inefficiencies.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to determine if there are other related codes. Additional codes may provide more context to the issues affecting the exhaust or emission systems. | OBD-II Scanner |
Inspect the Exhaust Gas Temperature Sensor | Visually inspect the exhaust gas temperature sensor for Bank 2 Sensor 3. Check for any visible damage, loose mounting, or signs of contamination that could affect signal stability. | Flashlight, Safety Gloves |
Wiggle Test for Intermittent Issues | While monitoring the sensor signal with a diagnostic tool, gently move the sensor wiring and connectors to see if there are any fluctuations in the readings. This can help identify loose or poor connections. | Diagnostic Tool, Multimeter |
Inspect Wiring and Connectors | Examine all wiring and connectors associated with the temperature sensor. Look for signs of damage, corrosion, or wear that could result in intermittent connectivity. | Flashlight, Multimeter |
Check Sensor Output Stability | Use a diagnostic tool to monitor the temperature sensor’s readings over time and during different engine conditions. Verify that the readings remain stable and are not erratic. | Diagnostic Tool |
Test Circuit Continuity | Use a multimeter to check the continuity of the circuit. Ensure there are no open or short circuits that could cause erratic signals from the sensor. | Multimeter |
Repair or Replace Damaged Wiring or Connectors | If wiring or connectors are found to be causing intermittent issues, repair or replace them to restore stable sensor operation. | Wiring Repair Kit, Connector Tools |
Replace the Sensor if Faulty | If the temperature sensor itself is not providing a stable signal, replace it to restore accurate temperature monitoring and emissions control. | Replacement Sensor, Wrench Set |
Clear the Code and Test Drive | After completing repairs, clear the P246A code using an OBD-II scanner. Take the vehicle for a test drive to monitor the sensor output and confirm that the issue has been resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
Recheck for Codes | Re-scan the vehicle after the test drive to verify that the P246A code has not returned. If the code persists, further diagnostics will be required to identify and resolve any remaining issues. | OBD-II Scanner |

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Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)