Question about Cars & Trucks
It is a sensor which can hold, get some help before starting spending money.
Posted on Aug 26, 2019
SOURCE: My pathfinder goes into a
Have an OBII scan done. (fault scan) Any good parts store (Autozone, Advance, etc...) can do it & FREE. This will identify what exactly is needed to be replaced, instead of throwing parts at it. When was last time fuel filter was replaced and injectors cleaned? I'd start there...
Posted on Mar 13, 2011
Do you know anything about ECM five volt reference circuit's ?
DTC P0641: 5-Volt Reference 1 Circuit
The engine control module (ECM) has 3 internal 5-volt reference busses called 5-volt reference 1, 5-volt reference 2, and 5-volt reference 3. Each reference bus provides 5-volt reference circuits for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to that reference bus. The ECM monitors the voltage on the 5-volt reference busses.
The 5-volt reference 1 bus provides 5 volts to the following sensors:
• The manifold absolute pressure (MAP) sensor
• The clutch apply sensor
• The fuel rail sensor
• The fuel tank pressure (FTP) sensor
• The intake air pressure and temperature sensor
You have a shorted sensor more then likely or wiring problem . Suggest you watch this video .
How to check the 5v reference circuit for short to ground Cadillac
Posted on Jun 18, 2018
Tips for a great answer:
Jun 18, 2018 | 2009 Chevrolet Cobalt
Jun 10, 2017 | Cars & Trucks
Limited throttle mode--The ECM will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
Throttle default mode--The ECM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
Forced idle mode--The ECM will perform the following actions:
Limit engine speed to idle by positioning the throttle position, or by controlling the fuel and spark if the throttle is turned off.
Ignore the accelerator pedal input.
Engine shutdown mode--The ECM will disable fuel and de-energize the throttle actuator.
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