Question about 1999 Chevrolet Lumina
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Posted on Jan 02, 2017
SOURCE: My 99 Jeep Wrangler failed
DTC P0650 represents an issue with the actual check engine light (malfunction indicator lamp). Ignition voltage is supplied directly to the malfunction indicator lamp (MIL). The powertrain control module (PCM) controls the lamp by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the component being controlled. The driver has a fault line which is monitored by the PCM. When the PCM is commanding a component ON, the voltage of the control circuit should be low, near 0 volts. When the PCM is commanding the component control circuit OFF, the voltage potential of the circuit should be high, near battery voltage. If the fault detection circuit senses a voltage other than what is expected, the fault line status will change causing the diagnostic trouble code (DTC) to set.
A DTC P0650 indicates a problem with the circuit to the actual check engine light itself. If the fault is current, check if the check engine (service engine soon) lamp comes on when you turn the ignition on, If not, we will need to pull the engine control computer and ground the wire that goes to the light. If the light comes on, it is a failed pcm which must be replaced and reprogrammed. If not, it is either the circuit to the cluster or the cluster itself.
Posted on Sep 22, 2011
SOURCE: 2006 chev malibu p0446 code
You need to find out which evap control solinoid is not working the best way is to take it to a shop and have them run a smoke test through the system todetermine which valve or valves are inop,or if there is a break in the hoses.
Posted on Mar 29, 2009
the solonoid on the side of the engine with the pipes running to the tank ,their is a pump as well that can be heard running sometimes its all in one and others are two units ,sorry but iam in europe and their all different
Posted on Dec 05, 2010
SOURCE: OBD INSPECTION; NO MIL
This sounds like it could be a paet called the canaster vent purge solionid. It could give you codes P0442 AND P0445 large and small leaks and also effect the EGR opperation P0403. Its located on the top of the intake manifold it opens and closes when comanded to to let fuel vaper in to the engine to be burned it the combustion chamber. If this valve were stuck in the open pisition this could cause all of these problems at the same time. No way to tell for sure with out looking at but this is well worth checking it vary well may be the olny problem you have
Posted on Dec 22, 2010
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The error code P0650 is a malfunction indicator lamp circuit, malfunction conditions. The possible causes are the MIL control circuit is open, or shorted ground to the system. It is possible that the PCM has failed, and it can either be flashed, or replaced. Remember to use genuine Delco products for optimal service.
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