What does Engine code P0051 mean?
What the P0051 code means. This code is set when the car’s computer, or Engine Control Module (ECM), detects low system voltage in the heater control circuit. The heater circuit in the heated oxygen sensor is for warming the sensor before the vehicle reaches operating temperature for an accurate reading.
Where is the O2 sensor on a p0051?
Specific repair steps may vary depending on the model. A P0051 DTC trouble code refers to the O2 sensor (oxygen sensor) located on Bank 2 in front of the catalytic converter. There is also an oxygen sensor behind the converter which is Sensor #2. Bank #2 is the side of the engine that does not contain cylinder #1.
What does the p0051 code on Bank 2 mean?
HO2S Heater Control Circuit Low (Bank 2, Sensor 1) What Does P0051 Mean? The P0051 code is a result of the bank 2 HO2S1 (pre catalytic converter heated oxygen sensor) heating element having low voltage. Heated O2 sensors have a separate heater inside the sensor to get them to operating temperature quickly.
What to do if your heater code is p0051?
To fix a P0051 Toyota DTC code, you’ll need to do a proper diagnosis. To do that, you’ll want to inspect the wiring and connectors leading to the sensor. Also if equipped with a heater relay and fuse, you’ll want to check those as well.
How can I fix a p0051 DTC code?
To fix a P0051 DTC code, you’ll need to do a proper diagnosis. To do that, you’ll want to inspect the wiring and connectors leading to the sensor. Also if equipped with a heater relay and fuse, you’ll want to check those as well. Use a digital volt ohm meter to:
HO2S Heater Control Circuit Low (Bank 2, Sensor 1) What Does P0051 Mean? The P0051 code is a result of the bank 2 HO2S1 (pre catalytic converter heated oxygen sensor) heating element having low voltage. Heated O2 sensors have a separate heater inside the sensor to get them to operating temperature quickly.
Can a faulty oxygen sensor cause a p0051 code?
Code P0051 can be triggered by anything from a defective oxygen sensor to a faulty PCM, so you must do your research thoroughly before attempting to resolve this code. It’s best to leave repairs to the experts if you aren’t confident in your automotive repair skills.
What does the p0051 code on a Toyota heater mean?
Essentially this P0051 Toyota code means that the resistance of the heater circuit is lower than normal. In most cases, that resistance level must fall below 0.8 A to trigger the DTC code.
Why does the ho2s heater control circuit log p0051?
This is why it contains a heater wire which can bring its temperature up quickly when needed. When the PCM detects that the resistance of the heater circuit is lower than normal, it logs P0051. The oxygen sensor measures the amount of oxygen present in the exhaust gas and compares it to the air outside.