What does PCM 5 volt reference circuit condition explain?
What does PCM 5 volt reference circuit condition explain?
Never many problems but now the idle slowly increases (up to about 1200rpm) on it’s own the warmer it get or the lon … read more my check engine light is on in my 2000 chevy impala the two codes it gives me are: PCM 5 volt reference voltage circuit condition,, and MAP/BARO or MAF/VAF sensor condition.
Where does the 5 volt reference circuit go?
The PCM supplies this 5 volts on this circuit. It goes to various sensors on the vehicle. Either one of these sensors is bad shorting this circuit out, the wiring is shorted or the PCM is just simply bad.
What should my PCM read when the engine is off?
Reconnect any loose wires if necessary. If your PCM has experienced corrosion, you’ll have to skip to step 5 to see if it’s failed. While you’re under the hood, use your multimeter to ensure that your battery has a full charge. It should read at least 12.6 volts with the engine off, or 13.7 volts with the engine running.
Why is p0405 set on Ford OBD code?
The EGR system feedback circuit allows the PCM to see if the EGR valve pintle is actually moving as it should. If the feedback circuit detects that the voltage is unusually low, or it’s position is lower than it’s commanded to be, P0405 may set. Solutions If you have access to a scan tool you can command the EGR valve on.
Never many problems but now the idle slowly increases (up to about 1200rpm) on it’s own the warmer it get or the lon … read more my check engine light is on in my 2000 chevy impala the two codes it gives me are: PCM 5 volt reference voltage circuit condition,, and MAP/BARO or MAF/VAF sensor condition.
What should the voltage be on my ECM PCM sensor?
If the meter reads 5.0 volts, the electrical circuit is good. If the meter reads other than 5 volts, ground one meter lead and test the 5 volt reference wire. It should read 5 volts. If it doesn’t you have a wiring or computer problem. Using the wiring diagram check the pin at the computer that supplies the 5 volts.
Why does my PCM not work at low volts?
Could be partial power from your gauge sweep issue too, pumps get wonky at low volts. You may not get PCM communication if the voltage to it is off as well. Need to be going after battery WAY before PCM, it being low can blow your mind with various oddball errors.
The PCM supplies this 5 volts on this circuit. It goes to various sensors on the vehicle. Either one of these sensors is bad shorting this circuit out, the wiring is shorted or the PCM is just simply bad.
