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Why does check engine line come on when the heater is turned on in a 2005 trailblazer?
Wiki User
∙ 15y ago
Have it checked for trouble codes. You will then know what to diagnose. Check coolant level as well, look at the recovery tank to see if your level is up. ANOTHER THOUGHT Also, when you check the trouble codes, if nothing shows up you might want to put a volt meter on the battery. If the alternator can't keep up with the power that the blower is using you MIGHT be dropping below what the computer wants to see. Use a volt meter and check if the voltage drops below 13.5 VDC when the heater is turned on. You'll need to give the engine a little throttle, bring it up to around 1500 to 2000 RPM when you check the voltage level. If it's not maintaining voltage, it's probably the alternator. Have it checked by a reputable auto parts retailer such as Checker or Auto Zone.
Wiki User
∙ 15y ago
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How do you check for check engine light codes for a 2005 Chevrolet trailblazer?
With a scan tool.
Will the headlights cause check engine light to come on in 2003 trailblazer?
No
Engine running ruff engine light on heater stopped blowing hot air temp overheat turned off AC seems to run without over heating?
Check your cooling fan
What does the check engine light look like on a 2005 trailblazer?
In US it says "SERVICE ENGINE SOON" in Canada it looks like an engine.
What do you do if the check engine light comes back on after replacing the speed sensor?
I had all sensors replaced in my 03 Trailblazer and the check engine light stiil comes on. Why?
Heater blowing out cold air?
Check the radiator for full coolant. Check the engines water pump and thermostat, as the engine coolant carries heat from the engine into the heater core.
How do you get your check engine light turned off?
When a check engine light comes on, it means that there are issues with the engine. It gets turned off when the person resolves the problem that caused it to turn on.
How to reset check engine light on 2004 trailblazer?
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Check engine light comes on when key turned on but not coming on once engine is turned on why?
It is not supposed to be on when engine is running unless there is a problem.
Check engine light is on engine bogs down 2002 Chevy trailblazer?
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Check valve causing check engine light to come on 2005 Trailblazer?
I think you are talking about the secondary air check valve. Come to our enthusiasts forum and post your question there with the trouble code (Pxxxx) www.trailvoy.com All the Answers for your Trailblazer
Where is the engine block heater on a Ford Edge 2008?
If so equipped, check passenger side of engine at front for power cord Check right rear freeze plug for heater unit
