Newer oxygen sensors are heated for accuracy. If the heater element goes bad the oxygen sensor doesn't work and needs to be replaced. If you have an oxygen sensor heater malfunction, it just means that the oxygen sensor has failed.
A: Since you know the current flow you need the voltage drop for this particular led at 20ma. All LED require a current and voltage to operate properly assuming a voltage drop of 2v then for a 12v source it becomes 12-2=10v 10v/.02=500 ohms in series to limit the current is required
Jenkins - software - was created on 2011-02-02.
A: Add the proper resistor in series with the LED. What resistor? Simple 10volts source minus the LED source divided by the 20ma current that should be flowing gives you the resistor 10-1.8=8.2/.02=900 ohms. The 1.8 can be anything it is up to the LED voltage drop. LONG LEAD IS POSITIVE SHORT IS NEGATIVE SINCE IT IS A DIODE
BitTorrent - software - was created on 2001-07-02.
P0157 02 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
Sounds like you need a new 02 sensor.
Bank 1 sensor 1 is the first oxygen sensor usually in the exhaust manifold. Usually it needs to be replaced. Sometimes it can just be a bad connection in the plug for the oxygen sensor.
P0304 is #4 cylinder misfire. P0131 is O2 Sensor Low Voltage Bank 1 sensor 2
You have a bad 02 sensor after the catalytic converter.
The circuit voltage is too high. Could be a failed sensor, wiring short, or PCM problem.
Low voltage 02 Sensor bank 2.So :Faulty sensorPoor connectionDamaged or broken wire
Trouble code P0327 means:Knock sensor 1 low input
Bank 1 Sensor 2 is the sensor AFTER the catalytic converter. Causes could be,A faulty O2 sensor, Exhaust leak near the sensor, Damaged catalytic converter, Damaged wiring to O2 sensor,
That is behind the catalytic converter.
02 sensor
02 sensor heater curcuit malfunction (bank 1 sensor1)---change front 02 sensor if need be.