The P242B: Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3 refers to a problem with the performance or range of the exhaust gas temperature sensor in Bank 1, specifically Sensor 3. This could result from a faulty sensor, issues with wiring, or problems in the sensor’s circuit affecting its ability to operate correctly.
P242B – Quick Overview
Code | Information |
---|---|
Meaning | P242B: Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3 |
Is it serious? | Moderate – this issue can lead to incorrect exhaust temperature readings, which affects emissions control and engine efficiency. |
Possible causes | – Poor performance or range issues in the exhaust gas temperature sensor circuit Bank 1 Sensor 3 – Faulty sensor – Wiring or connector problems |
How to diagnose? | – Test the performance and range of the exhaust gas temperature sensor circuit – Inspect and test the sensor and wiring – Replace faulty sensor if needed |
P242B Meaning
The P242B: Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3 code indicates that there is an issue with the range or performance of the exhaust gas temperature sensor circuit in Bank 1, particularly Sensor 3. The sensor might not be providing readings within the expected range, which can lead to improper management of exhaust temperatures. This can ultimately cause inefficient engine performance and increased emissions.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to determine if there are any other codes present. Related codes can provide additional insight into the problem. | OBD-II Scanner |
Inspect the Sensor | Visually inspect the exhaust gas temperature sensor for Bank 1 Sensor 3 for any visible signs of damage, such as corrosion or physical wear. | Flashlight, Safety Gloves |
Test the Sensor Performance and Range | Use a diagnostic tool to test the performance and range of the exhaust gas temperature sensor. Compare the output to manufacturer specifications to determine accuracy. | Multimeter, Diagnostic Tool |
Inspect Wiring and Connectors | Check all wiring and connectors associated with Bank 1 Sensor 3 for any signs of damage, loose connections, or corrosion that could affect performance. | Flashlight, Multimeter |
Repair or Replace Wiring | If wiring or connector problems are found, repair or replace them to ensure a stable connection to the sensor. | Wiring Repair Kit, Connector Tools |
Replace the Sensor if Faulty | If testing reveals the sensor is not functioning within the expected range, replace the sensor with a new one to restore normal operation. | Replacement Sensor, Wrench Set |
Clear the Code and Test Drive | After completing the necessary repairs, clear the code using an OBD-II scanner and perform a test drive to ensure that the issue has been resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
Recheck for Codes | Re-scan the vehicle with the OBD-II scanner to confirm that the P242B code has not returned after the test drive. If the code persists, further diagnostics may be necessary. | 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)