20 Most Recent
Questions & Answers
Check engine light, low engine power
You get a reduced power message ? Your vehicle has electronic throttle control or also known as drive by wire . Your gas pedal is electrically hooked to the PCM - engine computer . Has two position sensors inside as does the throttle body on the engine . Over time these position sensors wear an cause improper signals to the computer an the computer will put the vehicle into a limp mode . Most cases it will drive but only at about 20 mph . There are videos on youtube showing how this works , how to diagnose etc....
This P0449 is something different , has to do with the Evap. emissions .
DTC P0449 Evaporative Emission (EVAP) vent Solenoid Control Circuit . Planty of videos on youtube for GM trucks on this problem .
DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
The predicted throttle position (TP) is compared to the actual throttle position. The two values should be within a calibrated range of each other. Both the powertrain control module (PCM) and the throttle actuator control (TAC) module redundantly monitor the predicted and actual throttle position. DTC P1516 sets if the PCM detects an out of range condition between the predicted and the actual throttle position.
Look's like you have three different problems , Thought p1516 an p1258 were going to point to same electronic throttle problem .
Engine Coolant Overtemperature - Protection Mode Active
The powertrain control module (PCM) uses the ECT sensor to monitor the engine for an over temperature condition. This condition occurs when the coolant temperature is above 132°C (270°F). When an over temperature condition is present, DTC P1258 will set. The PCM will disable two groups of four cylinders by turning OFF the fuel injectors. By switching between the 2 groups of cylinders, the PCM is able to reduce the temperature of the coolant.
Check the engine cooling fans for proper operation.
Are the engine cooling fans operative? Have you ever had the thermostat changed ? Is the coolant full ?
Check out youtube videos ! Just type your codes into the search bar .
on May 02, 2017
How does someone install manual oil pressure gauge on 2006 chevy 2500 with 6.0L Vortex
where the oil pressure sender unit is on the block install a "t" fitting . Place the electrical unit in one side and a brass fitting in the other . Run the copper line from the gauge through the firewall to the "T" piece and connect up (if you are using a plastic tube the do not waste your time as the plastic fails -cracks ,slips. or melts causing engine failure) Position the gauge and connect the copper line to the gauge . run engine and check for oil leaks.
on Dec 01, 2013
High oil preasure
check the air vent at the top of the engine it may be blocked. and there is another one at the bottom will see it sticking out and go into the top of the engine. a flex rod should clean it out on the bottom one even an old bit of hose pipe pushed down the pipe should clean it out. then do a oil change and filter.
on Sep 14, 2013
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