What is a O2 sensor heater circuit?
Heated O2 sensors have four wires. Two of those wires are always the same color, usually either white or brown. Those are the two heater wires; one receives voltage with the key on (through a relay), and the other is the ground control from the powertrain control module (PCM).
What is a F sensor?
The air-fuel ratio sensor monitors the oxygen content in the exhaust stream and sends data to the computer so that it can add or subtract fuel. If there is any problem with the sensor, it can send a bad or false signal to the computer which can throw off its calculations and cause it to waste fuel excessively.
How many O2 sensors does a 2007 Mazda 3 have?
Oxygen sensors are located before and after the catalytic converter. A vehicle may have two to five oxygen sensors, and sometimes even more.
What does the code mean on a Toyota p2238?
Because the heat of the heater is conducted through the alumina to zirconia (of the sensor portion), sensor activation is accelerated. The code is output when there is an open or short in the A/F sensor circuit, or if A/F sensor output drops.
How much does it cost to repair a p2238 Toyota engine?
The cost of diagnosing the P2238 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour. The Air-Fuel ratio (A/F) sensor provides output voltage approximately equal to the existing air-fuel ratio.
What does p2238 mean on an O2 sensor?
Although generic, the exact repair steps may vary depending on year, make, model and powertrain. A stored code P2238 means that the powertrain control module (PCM) has detected a positive current discrepancy in the upstream oxygen (O2) sensor for engine bank number one. Bank one is the engine bank that contains the number one cylinder.
What does p0171 lean mean on a Toyota?
P0171 Toyota Fuel System Lean Bank 1 P0171 Lean is a very common fault code on Toyota’s. In this article I am going to be discussing the 1.8, 2.4 4 cylinder engines in the Toyota Corolla, Camry, Rav4 and Matrix along with the V6 3.5 liter engine used in the Camry, Avalon, Solara and Sienna van.
https://www.youtube.com/watch?v=uyv9pOtiWgM