Code p0480, 2003 monte carlo

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Dankdank
Posts: 3
Joined: Thu May 18, 2017 1:23 pm
Vehicle: 2003 monte carlo ss

Code p0480, 2003 monte carlo

Postby Dankdank » Thu May 18, 2017 1:31 pm

I have a 2003 monte carlo the engine light on I got a code p0480 reading I changed the temperature sensor it went off then came back on the fans do work it comes on when idleing when temp about 185-190 car does not over heat went back to auto zone same code comes up


kev2
Posts: 6522
Joined: Sat Aug 29, 2009 4:24 pm

Re: Code p0480

Postby kev2 » Thu May 18, 2017 2:04 pm

Why did you change temp sensor?

This is a fan relay code - relay #1 circuit issue.
underhood fuses - fan control #1, 25amp, then ck fan cont #1 relay,
There are 2 boxes underhood top and "BOTTOM" owners manual will help if you have trouble. Or ask us.

AUTOZONE sells parts.

Dankdank
Posts: 3
Joined: Thu May 18, 2017 1:23 pm
Vehicle: 2003 monte carlo ss

Re: Code p0480, 2003 monte carlo

Postby Dankdank » Fri May 19, 2017 10:43 am

I changed relay still the same code reading

kev2
Posts: 6522
Joined: Sat Aug 29, 2009 4:24 pm

Re: Code p0480, 2003 monte carlo

Postby kev2 » Sun May 21, 2017 8:58 am

did you check fuses ?
CAn you use a DVOM and wiring dia?

Dankdank
Posts: 3
Joined: Thu May 18, 2017 1:23 pm
Vehicle: 2003 monte carlo ss

Re: Code p0480, 2003 monte carlo

Postby Dankdank » Sun May 21, 2017 12:04 pm

Yes I check fuses all good what's a dvom and wiring diagram?

kev2
Posts: 6522
Joined: Sat Aug 29, 2009 4:24 pm

Re: Code p0480, 2003 monte carlo

Postby kev2 » Sun May 21, 2017 3:02 pm

Code indicates the PCM is not seeing correct voltage on green wire...
Confirm that the 2 wires I colored have 12v kOEO.
OR swap relays 1 wit relay 2 see if code changes....

Let us know if there is a remote starter or aftermarket alarm...
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