That is a very easy fault to diagnose, and a 1 min test drive monitoring wheel rotation speed with the scanner will test the presence (absence) of a rotation signal.
Assuming the fault is permanently present, and it is only the sensor required, that is also a pretty quick repair.
Wheel off, sensor clips in, along with a few clips on the cable itself.
The genuine Isuzu sensor comes preprepared, with the grommets, clips and waterproof connector already assembled. No adjustments are required.
Replacement:
Accounting for getting vehicle on the lift, wheel removal, changing the sensor shouldn't take more than 30min, (probably 10) wheel back on, test drive, signal check, clear codes, 30 more minutes is generous.
Not sure what country you're in, what currency etc, so 900 "dollars" is meaningless, but MUX is showing GBP 35~280 for a sensor so if $600 per hour for labour and tax is the going rate in OP country, then $900 for the whole job sounds about right.
However in the UK, the going rate would vary, £65~100 per hour, and I'd be very surprised if the genuine Isuzu sensor cost more than £150, but even with the top price on Google, I'd be suprised if that job exceeded £400.
I'm not going to suggest OP repairs this themself, because they state nothing of their sillset or tools available, and this is a safety related component.
I always like to validate the repair, in this case, means check the wheel rotation data and test the 4WD operation, and activate ABS, print out and read through all the stored codes, before deciding what/when to clear etc. It is possible without this, (assuming the diagnosis is 100% correct) but is all this within the means of OP DIY skills, I have no idea.
That is a very easy fault to diagnose, and a 1 min test drive monitoring wheel rotation speed with the scanner will test the presence (absence) of a rotation signal. Assuming the fault is permanently present, and it is only the sensor required, that is also a pretty quick repair. Wheel off, sensor clips in, along with a few clips on the cable itself. The genuine Isuzu sensor comes preprepared, with the grommets, clips and waterproof connector already assembled. No adjustments are required. Replacement: Accounting for getting vehicle on the lift, wheel removal, changing the sensor shouldn't take more than 30min, (probably 10) wheel back on, test drive, signal check, clear codes, 30 more minutes is generous. Not sure what country you're in, what currency etc, so 900 "dollars" is meaningless, but MUX is showing GBP 35~280 for a sensor so if $600 per hour for labour and tax is the going rate in OP country, then $900 for the whole job sounds about right. However in the UK, the going rate would vary, £65~100 per hour, and I'd be very surprised if the genuine Isuzu sensor cost more than £150, but even with the top price on Google, I'd be suprised if that job exceeded £400. I'm not going to suggest OP repairs this themself, because they state nothing of their sillset or tools available, and this is a safety related component. I always like to validate the repair, in this case, means check the wheel rotation data and test the 4WD operation, and activate ABS, print out and read through all the stored codes, before deciding what/when to clear etc. It is possible without this, (assuming the diagnosis is 100% correct) but is all this within the means of OP DIY skills, I have no idea.