P042000
Catalyst System Efficiency Below Threshold (Bank 1) - Manufacturer Specific Code
Affects: Tiggo 4, Tiggo 7, Tiggo 8, Arrizo 5
On This Page
Quick Fix Summary
Common Causes
- •Faulty catalytic converter
- •Defective oxygen sensor (O2 sensor)
- •Engine misfire
- •Exhaust leak before catalytic converter
How to Fix
- 1Check O2 sensor readings with OBD2 scanner
- 2Inspect exhaust system for leaks
- 3Test catalytic converter efficiency
- 4Replace faulty O2 sensor or catalytic converter
Estimated Repair Cost (Australia)
*Cost varies by model, location, and service provider. Get multiple quotes.
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Try OBD2 Lookup Tool →Frequently Asked Questions
What does P042000 mean on a Chery?
P042000 means catalyst system efficiency below threshold (bank 1) - manufacturer specific code. The most common cause is a faulty O2 sensor or exhaust leak.
How much does it cost to fix P042000 on a Chery?
Repair costs for P042000 typically range from $300 to $1500 AUD, depending on the root cause.
Can I still drive with P042000 code?
P042000 is medium severity. You can drive short distances, but schedule a diagnostic soon.
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Explore All 61 Chery OBD2 Codes →P0420 Applies to These Chery Models in Australia
Same P0420 code across all models — O2 sensor is the #1 cause ($150-$300).
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