What is code #code p1296 - Jetta Volkswagen Cars & Trucks

https://repairpal.com/code-p1296-on-handheld-scanner-705

I doubt they did a 'tune up' at all. you only replace a fuel pump when it has failed. And fortunately for them, you can't see if it has been changed because it is inside the fuel tank. As my old dad used to say "they saw you coming", meaning you got fleeced because you are female. Put this on your car, leave it there. It talks to your smartphone and you can even reset codes. The Catalytic converter one is not critical, but the overheating is.

https://www.fixd.com/

P1296 is a coolant overheating code.

P1296 VOLKSWAGEN code possible causes - Engine-Codes ...

https://www.engine-codes.com > p1296_volkswagen
'P1296 VOLKSWAGEN code possible causes · Low engine coolant level · Faulty Engine Coolant Temperature (ECT) sensor · Faulty engine coolant thermostat · Engine ...

and your P0420 code is the Catalytic Converter code you originally went for.

P0420 VOLKSWAGEN Code - Catalyst System Efficiency ...

https://www.engine-codes.com > p0420_volkswagen
As the code description implies the P0421 code means that the vehicle's control module has detected that the three-way catalytic converter is not working ...

Hi, have there been any running issues. I have replaced a few acclerator pedal units due to the codes. p1296 is different and further diagnosis would be rquired as this is a general cooling system fault.

P1296 No 5-Volts to MAP Sensor
P0108 MAP Sensor Voltage Too High
P0500 No Vehicle Speed Signal Circuit
P1494 Leak Detection Pump Switch or Mechanical Faul
I would try MAP sensor first.

Try the thermostat. Very common on these models.

It is a 'under 5 volts' error to the map sensor.

Code p144a 02 sensor circuit high voltage(bank 1 sensor 3
code p1296 multi-faults-bank2-with low side shorts

2000 Dodge Dakota idle then dying problem FIXED Atleast my solution

P1296 is a cooling system malfunction. The two things that will set this DTC is a defective Engine Coolant Temperature (ECT) sensor or the thermostat.

P1296 is a coolant system fault code. It could be the thermostat, or the coolant temp sensor.
Either the thermostat is stuck or the coolant temp sensor is bad.
The coolant temp sensors have a reputation for going bad.