Can pending codes be cleared?
The short answer is yes. Your vehicle can pass the smog check with a pending trouble code, so long as the check engine light is not illuminated and the required emission monitors are ready. A pending trouble code may set for diagnostic purposes and will not illuminate the check engine light.
What does it mean when a fault code is pending?
Pending codes are caused by intermittent faults or faults that the PCM needs to see happen in two consecutive warm-up cycles to set the code. If the fault does not reappear within 40 warm-up cycles, the code will be cleared from memory.
Can you pass emissions with check engine light on?
I got it checked with an OBD scanner, and my codes were P1529 and P0715, which is something with a transmission control module and a speed sensor, nothing to do with actual emissions. My question is can I still pass emissions with the check engine light on even if the codes aren’t related to emissions?
When do you erase a pending fault code?
If you have read pending codes it is advisable to check the codes again after a week or so. If there is no apparent problem with the vehicle it is safe to erase the codes too and check back. But always make a note of any fault codes with the date and mileage of a vehicle. If the codes read include a DTC then you need to investigate further.
Why does pending trouble code not turn on Check Engine light?
Pending trouble codes do not turn on the check engine light because the engine control computer has not yet determined, for certain, that the engine has a fault. The computer has noticed a “possible” problem with the emissions system but needs to gather further data before being certain.
Can a car pass the smog test with a pending trouble code?
We say “should” because smog technicians have reported, and for unknown reasons, that they’ve had vehicles fail the smog test with only a pending trouble code (s). This is not the norm and 99.9% of the time a vehicle passes the smog test with a pending OBDII trouble code (s).
Can a car pass an emissions test with a reset check engine light?
There is an extremely small chance you can pass an emissions test by resetting the check engine light. However, this is not advised as masking a potentially serious issue poses a risk to not only you, but other drivers and passengers on the road.
Pending trouble codes do not turn on the check engine light because the engine control computer has not yet determined, for certain, that the engine has a fault. The computer has noticed a “possible” problem with the emissions system but needs to gather further data before being certain.
What happens when you fail an emissions test?
Here are some examples of what a technician might find during troubleshooting: Problems with either the engine or transmission can lead to an increase in tailpipe emissions, as well as an illuminated “Check Engine” light. The end result is a failed emissions test. Modern cars have an array of emissions equipment onboard.
We say “should” because smog technicians have reported, and for unknown reasons, that they’ve had vehicles fail the smog test with only a pending trouble code (s). This is not the norm and 99.9% of the time a vehicle passes the smog test with a pending OBDII trouble code (s).