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Robert, Vauxhall Technician
Category: Vauxhall
Satisfied Customers: 4716
Experience:  Fully qualified 19+yrs exp/self employed technician in the UK
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Have a insignia 2009.had a code 4 this morning temperature

Customer Question

have a insignia 2009.had a code 4 this morning temperature reading 130.just came out of no where.i have been using the heater and not had the air con on.any ideas please?
Assistant: Do the vents feel cold? Is there a coolant leak?
Customer: vents feel normal.i topped up the coolant but doesn't seem to have leaked although not certain
Assistant: What is the model of your '09 Vauxhall?
Customer: 1.8 club
Assistant: Are you fixing your vehicle yourself? What have you tried so far?
Customer: just the coolant so far.been thinking of getting AA to take it to vauxhall tomorrow.don't know what to do to be honest
Assistant: Anything else you want the mechanic to know before I connect you?
Customer: no i think that's it thanks
Submitted: 4 months ago.
Category: Vauxhall
Expert:  Robert replied 4 months ago.


Sometimes the ECM will turn the A/C off code 4 to take load off the engine if its detects an overheating situation...likely causes id say could be an issue on the coolant system itself either a bad thermostat more than likely here as it not to uncommon to see these fail..failing water pump or the main fans are just not kicking in..all 3 need to be investigated to ensure thats not the case..hope this helps