P0172
System Too Rich (Bank 1)
Affects: Tiggo 4, Tiggo 7, Tiggo 8
On This Page
Quick Fix Summary
Common Causes
- •Faulty fuel pressure regulator
- •Leaking fuel injector
- •Faulty O2 sensor
- •Dirty air filter
How to Fix
- 1Test fuel pressure
- 2Inspect fuel injectors for leaks
- 3Check O2 sensor readings
- 4Replace air filter
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 P0172 mean on a Chery?
P0172 means system too rich (bank 1). The most common cause is a faulty O2 sensor or exhaust leak.
How much does it cost to fix P0172 on a Chery?
Repair costs for P0172 typically range from $200 to $800 AUD, depending on the root cause.
Can I still drive with P0172 code?
P0172 is medium severity. You can drive short distances, but schedule a diagnostic soon.
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