Ford P1151 Error Code: How to Fix It

Q: Can I drive with Ford P1151 error code?

You can drive short distances, but prolonged driving with P1151 can damage your catalytic converter and reduce fuel economy. The lean condition can cause engine damage over time, so address it promptly.

Q: How much does it cost to fix Ford P1151?

If it's just an oxygen sensor replacement, expect $150-$300 including parts and labor. However, if underlying issues like vacuum leaks or fuel system problems are present, costs can range from $300-$800 depending on the root cause.

Q: What causes Ford P1151 lean condition?

Common causes include a faulty oxygen sensor, vacuum leaks in intake manifold or hoses, clogged fuel injectors, low fuel pressure, or exhaust leaks before the oxygen sensor. Mass airflow sensor problems can also trigger this code.

Q: Will P1151 cause my Ford to fail emissions test?

Yes, P1151 will typically cause your vehicle to fail an emissions test. The lean condition affects exhaust emissions and the check engine light prevents passing most state inspections.

Q: How do I know which bank is Bank 2 on my Ford?

Bank 2 is the side of the engine that doesn't contain cylinder #1. On most Ford V6 and V8 engines, Bank 2 is the passenger side (right side when facing the engine). Consult your owner's manual for your specific engine configuration.

Abstract

Ford error code P1151 indicates that the HEGO (Heated Exhaust Gas Oxygen) sensor on Bank 2, Sensor 1 is detecting a lean fuel mixture. This sensor monitors the oxygen content in your exhaust to help the engine control module adjust the air-fuel ratio for optimal performance and emissions.