What does the DTC code p0139 stand for?
Diagnostic trouble code (DTC) P0139 stands for “O2 Sensor Circuit Slow Response (Bank 1, sensor 2).” It indicates that the powertrain control module (PCM) has detected a potential issue with the signal from the rear oxygen sensor on bank 1.
When is the p0139 code detected in the ECM?
When is the P0139 code detected? The P0139 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor takes more time to respond between rich and lean than the specified time. The Heated Oxygen Sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank.
Why does my rear oxygen sensor log p0139?
As was mentioned, the rear oxygen sensor doesn’t fluctuate back and forth like the front sensor. But the rear sensor’s signal should vary somewhat over time. If the rear sensor’s signal is slow to change or does not change at all, the PCM may log code P0139.
How much does it cost to fix a rear O2 sensor?
Most auto repairs shops charge between $75 and $150 per hour. When is the P0139 code detected? The P0139 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor takes more time to respond between rich and lean than the specified time.
What is the p0139 code on the O2 sensor?
The P0139 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor takes more time to respond between rich and lean than the specified time. The Heated Oxygen Sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank.
What are the possible causes of Honda p0139?
P0139 Honda Possible Causes. Faulty Rear Heated Oxygen Sensor Bank 1. Rear Heated Oxygen Sensor Bank 1 harness is open or shorted. Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection. Inappropriate fuel pressure. Faulty fuel injectors. Intake air leaks may be faulty.
What does p0139 stand for on a PCM?
If the rear sensor’s signal is slow to change or does not change at all, the PCM may log code P0139. Note: The definition of code P0139 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
When to set the O2 sensor trouble code?
The ECM cuts all fuel to the engine during deceleration of the engine and the O2 sensors all should respond with a voltage output below .2 volts showing the exhaust stream is high in oxygen content. The code is set if the O2 sensor for bank 1 sensor 2 does not respond to the fuel cutoff for 7 seconds or more.