P1296 Volkswagen/Audi Fault Code: Engine Cooling System Malfunction
Whenever a vehicle throws a check engine light, it is always a good idea to use an OBD-II scanner to see what codes are causing the issue. If a P1296 code pops up, you will more than likely read “Engine Cooling System Malfunction” or “Error in Mapped Cooling System”. As it reads, this engine code means that there is an issue in the cooling system. The cooling system removes excess heat from the engine, maintains optimal engine temperature, and brings the engine’s temperature to its optimal level as quickly as possible for efficiency purposes.
Can I still drive with a P1296 Volkswagen or Audi Fault Code?
This is a common question when it comes to a lot of fault codes, but with a P1296 engine code, we highly advise not driving. If the cooling system fails, whether it be the engine coolant temperature sensor or the thermostat, it may cause the engine to overheat. Without a functioning cooling system, this could cause major engine damage in the long term.
P1296 VW/Audi Symptoms
- Check Engine Light (CEL) illuminating
- Coolant light illuminating (low coolant)
- Cold start issues
- Engine overheating
- Sporadic engine temperature readings
Causes of P1296 VW/Audi Engine Code
- Faulty engine coolant temperature (ECT) sensor
- Coolant thermostat failure (stuck open)
- ECT sensor harness failure
- ECT electrical circuit failure
How to Repair a Volkswagen or Audi with a P1296 Engine Code
Many fault codes can be hard to diagnose when it comes to Volkswagen’s or Audi’s, as the EPC light, but this engine code is pretty simple. The majority of the time your vehicle receives this code, the engine coolant temperature sensor has failed. If you happen to replace the ETC sensor and the code isn’t gone, the next place to look is the coolant thermostat. Hopefully, by then, the code will be off, but if not then most likely there is an electrical issue with the ETC harness or circuit overall.
The guides and parts are related to the 1.8t engine, so please make sure the parts fit your vehicle before ordering if you do so. Let us know if you need help looking for guides or parts for any other engine in the comments below.
How to Replace an Engine Coolant Temperature (ETC) Sensor
As stated above, the majority of the time this code is thrown is because of a faulty or failing ETC sensor. An ETC sensor monitors the engine’s coolant temperature to ensure it is at the optimal temperature. We advise starting the diagnosis here because the part is cheap and the DIY is easy.
How to Replace a Thermostat
The next most likely cause of this engine code is a failing or already failed thermostat. A thermostat regulates the amount of coolant that is recirculated into the engine and how much is cooled by the radiator. Although it is not the cheapest part or easiest DIY, it could save you from the ~$300 that a dealership would charge.
How to Replace the Electrical Harness on an ETC
If neither of the solutions above has corrected the code, then there is probably an issue with the ETC sensor harness or electrical current. When it comes to this, it is tricky to replace, so it may be worth taking it to a shop to replace.
ETC Harness Replacement: https://amzn.to/3mY1j4N
DIY Difficulty: Hard
P1296 VW Conclusion
To wrap this guide up, if a Volkswagen or Audi is throwing a P1296 code, the most likely cause is a failing ETC sensor or a failing thermostat. With this code, it is not advised to drive on it because the vehicle can overheat and cause further engine damage. Again, if you are looking for guides or replacement parts for another vehicle, reach out in the comments and we will assist in any way possible.
Feel free to read up on our Volkswagen/Audi 2.0t TSI common problems post.