Hi everyone, my '91 TT is reading error code 21 (ignition sensor circuit) or the PTU.. I'm sure this is quite a common problem experienced by lots of users and I apologise if there's threads I've missed.
I understand pre '92 models had an older version PTU which was prone to failing and was later replaced for a more reliable unit. My question is: is it a simple case of buying the newer replacement unit? I'm assuming I will need an adaptor harness also? Is there anything else I'm missing?
Hi everyone, my '91 TT is reading error code 21 (ignition sensor circuit) or the PTU.. I'm sure this is quite a common problem experienced by lots of users and I apologise if there's threads I've missed.
I understand pre '92 models had an older version PTU which was prone to failing and was later replaced for a more reliable unit. My question is: is it a simple case of buying the newer replacement unit? I'm assuming I will need an adaptor harness also? Is there anything else I'm missing?
Thank you in advance.
Jay