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P2639 Engine Trouble Code

Meaning of P2639 engine trouble code is a kind of powertrain trouble code and P2639 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,140 and you can't do it yourself unless you're an experienced mechanic.

P2639 Fault Symptoms :

Check engine light comes on
Engine stalling or misfiring
Engine performance issues
Car not starting

If one of these reasons for P2639 code is occuring now you should check P2639 repair processes.
Now don't ask yourself; What should you do with P2639 code ?
The solution is here :

P2639 Possible Solution:

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

P2639 Code Meaning :

P	2	6	3	9
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine	Fuel And Air Metering (Injector Circuit Malfunctions Only)	Fuel Temperature Sensor B Circuit Range/Performance	Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)	Reverse Input Circuit

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate.

P2639 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P2639 engine trouble code is about Reverse Input Circuit.

Main reason For P2639 Code

The reason of P2639 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

P2639 DTC reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.

	Example: 0140