Check Engine Light turned on, code P1529?

2003 HYUNDAI ELANTRA

186,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC

DABY0729

MEMBER
1 POST

Check engine light came on today prior to this I did have loss of acceleration every time I would stop and go at a light or stop sign it would not accelerate properly. Everywhere I read I keep getting input or output or both sensors.

It idles high every time from a cold start.

These are the only issues I have with the vehicle.

The light came on about a year ago and it was the same code and I reset it and now it just came back on.

Nov 5, 2022 at 3:32 PM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,240 POSTS

Hi,

The code is related to the transmission. The transmission control module (TCM) can request activation of the MIL lamp via a communication line to the PCM. This is only a request from TCM to PCM to turn the check engine light on.

So, P1529 is just an indicator that a trouble code is stored in the TCM. You need to have a scan tool that can read codes from the transmission module. In this case, I would recommend scanning the can-bus.

CAN stands for controller area network. Basically, the different computers/modules are tied together via a few wires. This will retrieve the codes regardless of the module storing them. In this case, it's the TCM.

Here is a link explaining how it is done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

This is what needs to be done so we know which direction to go. Is this something you can have done?

Let me know.

Joe

Nov 5, 2022 at 4:49 PM

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