Ford Error Code P1152: How to Fix It

Medium 2-4 hours Medium Severity Verified June 2026
Error Code
P1152
Brand
Ford
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
2-4 hours
Error code P1152 on your Ford indicates that the upstream oxygen sensor on bank 2, sensor 1 is detecting a rich fuel mixture condition. This means there's too much fuel or not enough air in the combustion chamber, which can reduce fuel efficiency and increase emissions.
Ad

Tools You'll Need

How to Fix Error Code P1152

  1. Safety First and Initial Inspection

    Never work on a hot engine. Exhaust components can cause severe burns.
  2. Connect OBD2 Scanner and Record Data

  3. Inspect Air Filter and Intake System

  4. Check Fuel System Components

    Fuel system is under pressure. Relieve fuel pressure before disconnecting any fuel lines.
  5. Test Oxygen Sensor Operation

    Exhaust components will be hot. Wear heat-resistant gloves and avoid touching hot surfaces.
  6. Clean or Replace Components

  7. Clear Codes and Test Drive

Parts You May Need

Engine air filter
Check Price on Amazon
Upstream oxygen sensor
Check Price on Amazon
Mass airflow sensor
Check Price on Amazon
Engine air filter
Check Price on Amazon
Upstream oxygen sensor
Check Price on Amazon
Mass airflow sensor
Check Price on Amazon
Engine air filter
Check Price on Amazon
Upstream oxygen sensor
Check Price on Amazon
Mass airflow sensor
Check Price on Amazon
Engine air filter
Check Price on Amazon
Upstream oxygen sensor
Check Price on Amazon
Mass airflow sensor
Check Price on Amazon
Engine air filter
Check Price on Amazon
Upstream oxygen sensor
Check Price on Amazon
Mass airflow sensor
Check Price on Amazon
Engine air filter
Check Price on Amazon
Upstream oxygen sensor
Check Price on Amazon
Mass airflow sensor
Check Price on Amazon
Ad

When to Call a Professional

Contact a qualified mechanic if you find multiple fuel system components are faulty, if the catalytic converter is damaged, or if you're uncomfortable working with fuel system components. Professional diagnosis may be needed if the problem persists after replacing obvious components.

Frequently Asked Questions

What causes Ford error code P1152?
P1152 is typically caused by a dirty air filter, faulty mass airflow sensor, vacuum leaks, fuel injector problems, or a contaminated oxygen sensor. It indicates the engine is running too rich on bank 2.
Can I drive with Ford code P1152?
You can drive short distances, but the vehicle will have reduced fuel economy and increased emissions. Address the issue promptly to prevent potential damage to the catalytic converter.
How much does it cost to fix P1152 on a Ford?
Repair costs vary widely depending on the root cause. Simple fixes like air filter replacement cost $15-30, while oxygen sensor replacement ranges $150-300, and fuel injector issues can cost $300-800.
Will P1152 cause my Ford to fail emissions testing?
Yes, P1152 will likely cause your vehicle to fail emissions testing since it indicates the engine is running rich and the check engine light is illuminated.
Which oxygen sensor is bank 2 sensor 1 on Ford vehicles?
Bank 2 sensor 1 is the upstream oxygen sensor located on the passenger side exhaust manifold (before the catalytic converter) on most Ford V6 and V8 engines.