Code 33, 41, 42

GNG45
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Joined: Tue Nov 03, 2015 6:20 pm

Code 33, 41, 42

Postby GNG45 » Tue May 01, 2018 2:08 pm

Hello everyone, I removed my intake manifold and IACV in order to clean the IACV and got codes 33, 41, and 42. I read that 41 and 42 are the TPS and MAP. I checked both and they are plugged in. In ideas on what I should be looking for?

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aukword1
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Re: Code 33, 41, 42

Postby aukword1 » Wed May 02, 2018 8:17 am

Did you remove the TPS when you were cleaning the intake manifold? If you did remove the TPS, you have to calibrate it. I'd start by checking for shorts in the wiring or by making sure the contacts are clean. if that all checks out, try checking for vacuum leaks and correct vacuum routing. If all that checks out, let us know.

GNG45
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Re: Code 33, 41, 42

Postby GNG45 » Wed May 02, 2018 4:17 pm

No I just unplugged the TPS. Anywhere I can find a vacuum routing diagram?

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jondee86
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Re: Code 33, 41, 42

Postby jondee86 » Wed May 02, 2018 5:36 pm

What engine is this ? 16V, 20V etc.

Long shot... if 16V did you make sure the ECU grounds are bolted down to the inlet manifold >

Cheers... jondee86
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GNG45
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Re: Code 33, 41, 42

Postby GNG45 » Fri May 04, 2018 5:18 pm

It's a blacktop 20V

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jondee86
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Re: Code 33, 41, 42

Postby jondee86 » Fri May 04, 2018 7:17 pm

So, according to the BT Manual...
Code 33 = Open of Short in ISCV circuit.
Code 41 = Open or Short in TPS circuit for 0.5 sec or more.
Code 42 = No vehicle speed signal to the ECU for at least 8 sec etc.

Kind of hard to fcuk any of these up by just unplugging and plugging back in
a few connectors. Probably the best thing to do is pull the EFI fuse or disconnect
the battery for a couple of minutes to reset the ECU. Then go for a test drive
and see if the codes are still there.

Cheers... jonfee86
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