A check engine light appears on your dashboard. Checking the code, you find P1164. What does this mean? If this code appears on your Honda Accord, you may have a problem with your primary O2 sensor.
To remove the code from the ECU, you must remove the 7.5A BACKUP fuse under the hood for about a minute. You are good to go if the CEL code does not repeat. Alternatively, if the sensor wiring is good, replace the front sensor.
It is most likely that there is a bad connection at the O2S connector, in the relay connector, in the underhood fuse box connector or even in the main harness to the PCM connector if the P1164 continues to appear after replacing the sensor.
If you notice any damage or corrosion to the harness or connections, you should check them out immediately.
What Does Code P1164 Mean On A Honda Accord?
The P1164 code refers to a defective air/fuel ratio sensor, also known as an oxygen sensor. The closest exhaust sensor to the engine is this one.
An intermittent circuit board, connection, or wiring failure could cause the control lights to work intermittently. You would need to test for power at the illumination wire going to the control panel during the problem to know for sure.
Power proves a good control panel. If not, then a wiring/connection problem would be to blame. A shop would charge around $300 to replace the air/fuel ratio sensor, but you can do it within an hour.
Code P1164 Honda Description
A/F sensor 1 measures the oxygen content in exhaust gasses and detects the Air/Fuel Ratio (A/F). Engine Control Modules (ECMs) receive voltage from the A/F sensor.
It is embedded in the A/F sensor (sensor 1), and there is a heater for the sensor element. By adjusting the current flowing through the heater, it activates and heats the sensor, allowing it to detect oxygen content more quickly and accurately.
Since the amount of oxygen that is led through the diffusion layer is limited, an increase in the current plateaus at a certain voltage is applied to the element electrode.
A current amperage measurement can detect the air/fuel ratio since it correlates with oxygen content in exhaust gasses. The ECM controls fuel injection timing by comparing a set target air/fuel ratio with the detected air/fuel ratio.
An ECM issues a Rich command when a low A/F sensor (sensor 1) voltage indicates a lean air/fuel ratio. An ECM issues a Lean command if the A/F sensor voltage (sensor 1) is high, which indicates a rich air/fuel ratio.
When Is The Code P1164 Honda Detected?
Whenever the power is drawn to the A/F sensor (sensor 1) heater and no element is activated, or the ECM terminal voltage is a set value or less, a malfunction is detected, and a code is stored.
How To Fix A P1164 Honda Accord Code?
A P1164 code is set when the primary O2 sensor reports O2 levels outside the range that the ECM “knows” is reasonable. There are many possible causes for this error code.
A freeze frame can help diagnose this problem. However, it is necessary to examine the freeze frame history of several code events to see which tendencies are present.
Those specifics should influence your general direction. As you replace the cheaper parts, you work up to the more expensive ones.
There is probably a bad connection at the O2S connector, relay connector, under-hood fuse box connector, or even the main harness into the PCM connector if the P1164 still pops up after replacing the sensor. Make sure the harness and connections are not damaged or corroded.