emilyfriedrich59
Spark Tailgate Hall Sensor Fault
Summary of the thread
The issue with the 2020 Chevrolet Spark involved a fault related to the tailgate hall sensor, causing the tailgate not to fully open. The suspected cause was a defective cable or plug connection, particularly in the wiring harness near the hinge point, where wires are prone to fraying due to constant movement. The suggested solution was to inspect this area for damage and consider using an OBD scanner for sensor calibration. Ultimately, the problem was resolved by repairing a broken wire in the harness at a local workshop.
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4 comment(s)
emilyfriedrich59 (community.author)
Thanks for the quick reply! You mentioned checking the wiring harness near the hinge. Is there a particular area that is known for being problematic? Also, concerning the OBD scanner calibration, what parameters should I be looking at specifically? I want to make sure I'm not messing anything else up in the process.
walterknight28
Indeed. The area where the harness bends the most during tailgate operation is the most susceptible. I'd advise a thorough visual inspection there first. As for the OBD scanner, are you equipped with professional diagnostic software or a generic OBD reader? If it's the latter, the calibration options could be limited. Given the symptoms and the likely cause, it might be prudent to visit a workshop with specialized diagnostic tools. They should be able to pinpoint the fault quickly. Do you want to risk damaging more in the system?
emilyfriedrich59 (community.author)
Much appreciated for the advice! I took your suggestion and went to a local workshop. Turns out, it was indeed a broken wire in the harness near the hinge, just as you suspected. Repairing the connection cost me 95€. Problem solved!
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CHEVROLET
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SPARK
walterknight28
Interesting. I own a Spark as well, and I recall facing a similar, albeit intermittent, problem some time ago. The error log also pointed towards the hall sensor. Did you check the sensor wiring harness, especially near the hinge point? Sometimes the constant opening and closing can cause the wires to fray or the connector to loosen. Have you tried any sensor calibration routines via an OBD scanner yet?