What is a p1166 code on 2002 Honda CR-V?

P1166 is a trouble code for the 2002 Honda CR-V that indicates a problem with the air/fuel ratio sensor (A/F sensor). The A/F sensor is located in the exhaust system and measures the amount of oxygen in the exhaust gas to determine if the engine is running lean (too much air) or rich (too much fuel).

When the A/F sensor detects a problem, it sends a signal to the engine control unit (ECU), which then adjusts the fuel mixture accordingly. If the A/F sensor is not working properly, the engine may run rich or lean, which can cause a number of problems, including:

- Increased fuel consumption

- Reduced performance

- Engine knocking or pinging

- Check engine light illumination

- Emissions problems

If you see a P1166 code on your 2002 Honda CR-V, you should have the A/F sensor checked as soon as possible to prevent further damage to the engine.

Here are some things that can cause a P1166 code:

- A faulty A/F sensor

- A damaged A/F sensor wire

- A loose or disconnected A/F sensor connector

- A problem with the ECU

- A vacuum leak

- A fuel injector problem

- A compression problem

If you are not sure how to diagnose and repair a P1166 code, you should take your vehicle to a qualified mechanic.