Mazda DTC P1152 – HO2S Bank 2 Sensor 1 Signal Above 0.45v (A/F Ratio Too Rich)
DTC P1152 meaning on Mazda
DTC P1152 on a Mazda indicates that the Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 signal is reading above 0.45 volts, signaling that the air-fuel ratio is too rich.
Mazda DTC P1152 symptoms
Symptoms of DTC P1152 on a Mazda may include:
- Check Engine Light illuminated
- Decreased fuel efficiency
- Rough idling or engine misfires
- Black smoke from the exhaust
Mazda DTC P1152 causes
Common causes of DTC P1152 on a Mazda include:
- Faulty HO2S Bank 2 Sensor 1
- Vacuum leaks
- Fuel pressure too high
- Dirty or clogged fuel injectors
Mazda DTC P1152 seriousness
DTC P1152 should not be ignored as it can lead to decreased engine performance and potential damage to the catalytic converter over time if left unresolved.
How to diagnose DTC P1152 on Mazda
To diagnose DTC P1152 on a Mazda, you can:
- Use an OBD-II scanner to retrieve the trouble codes
- Inspect the HO2S Bank 2 Sensor 1 wiring and connections
- Check for vacuum leaks
- Test fuel pressure and injector operation
How to fix DTC P1152 on Mazda
To fix DTC P1152 on a Mazda, you may need to:
- Replace the HO2S Bank 2 Sensor 1 if faulty
- Repair any vacuum leaks
- Adjust fuel pressure if too high
- Clean or replace clogged fuel injectors
How to erase DTC P1152 on Mazda
To erase DTC P1152 on a Mazda, you can:
- Use an OBD-II scanner to clear the trouble codes
- Ensure the underlying issue has been resolved before clearing the code
Recommended tools for Mazda diagnostics
Explore our expert picks: The Best OBD2 Scanners for 2025
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.