XJ XJ6 / XJR6 ( X300 ) 1995-1997

P1158 trouble

 
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Old 01-28-2019, 07:15 PM
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Question P1158 trouble

Checked the computer and I pulled only a P1158 Code, problem is I need this fixed to pass NJ state inspection. Where would a good place to start with a problem like this? I've had the idle control valve replaced, 1 downstream O2 sensor, and mass airflow sensor changed within the past 2 years or so. Car also smells a bit rich. Any advice on where to start would be greatly appreciated!
 
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Old 01-28-2019, 07:46 PM
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For a 97 see page 124

ttp://www.jagrepair.com/images/Training%20Guides/801S%20-%202000.pdf

B2S2 , Lean Combustion





Check for corrosion on the connector

The return to the ECU wire shield grounds on the rear firewall upper left and right ground post


Do a resistance ckeck of the heaters comparing 2 different sensors , wire Blue / Brown through White / Green on the sensor half of the connector

Clean the connector Papa Indy 61 pin 12 wire color White / Green











Check condition of ECU connector socket Black 4

 

Last edited by Lady Penelope; 01-29-2019 at 07:15 AM.
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Old 01-28-2019, 09:55 PM
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Thank you for all the info!! I noticed this is for high voltage p0158, I have code P1158 should I still go through this same procedure with this code?
 
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Old 01-28-2019, 10:01 PM
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Your right , I failed to read correctly

Do over
 
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Old 01-29-2019, 07:32 AM
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Is it possible the catalyst is going bad?
 
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Old 01-29-2019, 04:14 PM
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Originally Posted by Lady Penelope View Post
For a 97 see page 124

ttp://www.jagrepair.com/images/Training%20Guides/801S%20-%202000.pdf

B2S2 , Lean Combustion





Check for corrosion on the connector

The return to the ECU wire shield grounds on the rear firewall upper left and right ground post


Do a resistance ckeck of the heaters comparing 2 different sensors , wire Blue / Brown through White / Green on the sensor half of the connector

Clean the connector Papa Indy 61 pin 12 wire color White / Green











Check condition of ECU connector socket Black 4

Is this the same for the P1158 running rich?
 
 
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