Fault code p0030 VW Polo 1.0 2001

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uk174
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Joined: Thu Mar 29, 2018 6:38 pm
Drives: vw polo 1.4se 2001
Location: birmingham

Fault code p0030 VW Polo 1.0 2001

Post by uk174 »

Evening folks,
my engine management light has come on recently, and according to my diagnostic code reader I have the foloowing fault code P0030 ..Heater Control Circuit, Bank 1 sensor 1.
One post on the net suggested a blown fuse as the cause of this light..when I checked this fuse..true enough it was blown.The fuse in question is position 1 on the fuse box.
I have since disconnected the sensor plug and noticed that though the light stays on( obviously as it is not connected), the fuse is not blown. My question is ..can a faulty sensor cause the fuse to blow or is the fault actually in the wiring of the sensor,ie/the wiring from the sensor to the plug end,in which case do I strip the wiring to find the fault.
Or could the fault be from the other end of the plug to the ecu or where ever it goes.Is there a definitive way to check the cause of the fault?
Many thanks in advance for any input.
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937carrera
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Joined: Sat May 17, 2014 8:19 am
Drives: 2000 Polo GTi
Location: North Yorkshire

Re: Fault code p0030 VW Polo 1.0 2001

Post by 937carrera »

A faulty sensor can cause a fuse to blow, though that is unusual.

If the fuse does not blow when the sensor is not connected then the wiring is probably OK.

Get another spare fuse and reconnect the sensor, see what happens
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