00513 - Engine Speed Sensor (G28)

[Khare]

Got this code.

00513 - Engine Speed Sensor (G28)
        27-10 - Implausible Signal - Intermittent

Never had it before. Ros tech wiki says this:

00513 - Engine Speed Sensor (G28): Implausible Signal
Possible Causes
Engine Speed Sensor (G28) Rotor loose/faulty
Engine Speed Sensor (G28) loose
Possible Solutions
Check Engine Speed Sensor (G28) Rotor
Tighten Engine Speed Sensor (G28)

Where is the engine speed sensor, what should the rotor look like and how to I tighten it up??

[Leon27]

On 16v engine - from underneath the car you'll see it on the lower right front of the block near gearbox. To change you need to support the engine, remove the starter bolts/engine mount/brackets to access and avoid rounding the allen bolt that holds it in place.

Not too sure what the pick up is (thinking flywheel) but implausible signal could be due to dodgy wiring as mine had:

http://www.golfgtiforum.co.uk/index.php?topic=152789.msg1403858#msg1403858

[Khare]

So you had problems with the earths under the battery tray?

Is the engine speed sensor the knock sensor? If it is then it may relate to the 2 misfires I had recently. I put tesco's 99 octane fuel in there and on two different occasions when suddenly flooring it, the car just bogs completely as if no spark was present. If I reapply throttle then it will pull away nicely. I'll clean up them earths tomorrow, I am having problems with the wiring system in the car, and both of the knock sensors are pretty oily, one of them has crap wiring AFTER the plug, on the engine loom side.

[Leon27]

The engine speed sensor (Crankshaft sensor) is different to a knock sensor. There are 2 knock sensors on these engines iirc and they basically detect the engine pre-detonating/misfiring from the 'knocking' and shaking the engine would produce when experiencing a fault.

Crank sensor basically picks up a reference point for TDC and sends this signal to the ECU to tell it when to make the coil spark.

Faulty crank sensor would cause a non-start, complete cut out etc. An intermittently faulty crank sensor may cause the problems you described and since its logged a fault it would be worth pursuing it further.

Check the wiring, if it looks happy then delete the fault codes. Road test it and when it happens again recheck the memory. The sensor could be on its way out.

Incidently, when the fault happened, did the engine cut out or revs drop down?

[Reasty]

You will probably find that the sensor has broken up where the wire goes into the head of the sensor,just changed mine 2 weeks ago and seems to have cured running issues (cutting out at any speed,flashing oil light) its worth getting a new crank sensor as they are a common issue with the mk3's especially 97 P reg ones,just as a warning tho, you will feel sick when you see what you get for the amount of money they cost,alot for not alot 

[Khare]

When it happened the revs just drop, no cutting out. I took my foot off the accelerator, re-applied and went alright.

Reasty, the engine is from a 97 R reg donor, however engine was made in 1996 according to the sticker on the cambelt cover. How much are the sensors new?

[Khare]

Just saw the GSF price 

[Adam]

Just saw the GSF price 

How much?

[Khare]

£43.50 I think it was

[Reasty]

It's about £55 including vat from eurocarparts,if it's a 96 engine it probably is the AGG which are the engines that suffer with the crank sensors.