Fault codes P0491 &amp; P0492

Monday 20th July 2020

The mrs took the car today to visit some friends in Bristol (we're in London) and about 15 mins into her journey I get a call saying the CEL light is on. She comes back and luckily her mum isn't using her car so she took that.

I went to ECP and picked up a OBDII scanner and it comes up with:

P0491 Secondary Air Injection System Insufficient Flow Bank 1
P0492 Secondary Air Injection System Insufficient Flow Bank 2

Cleared the codes and took it out for about a 30 mile drive and the CEL has not returned. Any ideas? 2005 987 2.7

647 posts

183 months

Tuesday 21st July 2020

Hi as u have both codes,i would go for the air pump failure.

This can be tested with the diagnostic tester.
I have changed a few over last couple of years.

Chris

ricof

Original Poster

97 posts

65 months

Tuesday 21st July 2020

cd1957 said:

Hi as u have both codes,i would go for the air pump failure.

This can be tested with the diagnostic tester.
I have changed a few over last couple of years.

Chris

Hi Chris, many thanks for that. Do you know a part number please?

647 posts

183 months

Friday 24th July 2020

Hi sorry for slow response,flat out with faulty Porsche cars.
Original part number is 997. 605.104.00

new part number 997.605.104.02 £550.09
plus vat.

I have replaced about 4 in last few years,undrr the inlet manifold drivers side.

Chris

ricof

Original Poster

97 posts

65 months

Friday 24th July 2020

cd1957 said:

Hi Chris,

Thank you for that - where are you sourcing from? Design911 has them at circa £800 plus VAT

647 posts

183 months

Friday 24th July 2020

The price was on my Porsche Partslink system,shows opc retail prices.
I have it at home,will double check.

I am at Porsche Cardiff in morning collecting some parts,i will check with them.

647 posts

183 months

Saturday 25th July 2020

The one on Design911 website is for Gen2 cars,its a 981 part number.

The Porsche price is still showing £550.

Chris

soxboy

6,768 posts

226 months