P0140
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
Affects: Tiggo 4, Tiggo 7
On This Page
Quick Fix Summary
Common Causes
- •Faulty O2 sensor
- •Wiring issue
- •Sensor contaminated
How to Fix
- 1Test O2 sensor
- 2Check wiring
- 3Replace sensor if faulty
Estimated Repair Cost (Australia)
*Cost varies by model, location, and service provider. Get multiple quotes.
⚠️ Disclaimer: This information is for educational purposes only and does not constitute professional mechanical advice. Always consult a certified automotive technician for accurate diagnosis and repair. Repair costs are estimates based on Australian market data (July 2026) and may vary by location, model year, and service provider.
Safety notice: Fault codes related to engine, transmission, or braking systems should be addressed immediately. Delaying repairs may result in further damage or safety hazards.
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Try OBD2 Lookup Tool →Frequently Asked Questions
What does P0140 mean on a Chery?
P0140 means o2 sensor circuit no activity detected (bank 1 sensor 2). The most common cause is a faulty O2 sensor or exhaust leak.
How much does it cost to fix P0140 on a Chery?
Repair costs for P0140 typically range from $150 to $400 AUD, depending on the root cause.
Can I still drive with P0140 code?
P0140 is medium severity. You can drive short distances, but schedule a diagnostic soon.
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