Hi I recently bought a mk4 golf gti 1,8t AUQ

last week I was driving around and the temp gauge slowly dropped to nearly zero then engine management light came on !

I took it to my friend who put is machine on and it said cooling temp sensor fault !

I bought a sensor from euro car parts and it fixed problem, however, today I was driving car and the same thing happened again, so I got someone else to check problem and code P1246 came up on diagnostics !

I've been informed possibly a faulty thermostat !

Can anybody help pls !

as soon as i started reading that i was thinking - thermostat gone/going... before even mentioning the temp sensor...

See here:

 

http://wiki.ross-tech.com/wiki/index.php/17654/P1246/004678

 

17654/P1246/004678

17654/P1246/004678 - Needle Lift Sensor (G80): Implausible Signal

Possible Symptoms

• Malfunction Indicator Light (MIL) ON
• Engine misfiring/juddering/running rough
• Engine shutting down

Possible Causes

• Fuel Supply interrupted/faulty
  • Fuel Tank (temporary) empty
  • Fuel Filter blocked
  • Air in Fuel System
• Wiring and/or Connector(s) from/to Needle Lift Sensor (G80) faulty
• Needle Lift Sensor (G80) faulty
• Injection Pump faulty

Possible Solutions

• Check Fuel Supply
  • Check Fuel Level
  • Check/Replace Fuel Filter
  • Check for Air in Fuel System
• Check Wiring and/or Connector(s) from/to Needle Lift Sensor (G80)
• Check/Replace Needle Lift Sensor (G80)
• Check Injection Pump

Special Notes

• Might by stored with other codes like 17656/P1248/004680.

 

Edited 1 December, 201411 yr by silver1011