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Marty, European Car Expert
Category: UK Car
Satisfied Customers: 406
Experience:  ASE & Bosch Certified Master Tech. Over 30 years experience.
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Chevrolet Camaro Z26: . I'm helping my brother-in-law with

Customer Question

Hi. I'm helping my brother-in-law with his 1996 Camaro Z26 6spd which is throwing a SES light after about 1 hour of driving. Fault codes have been read, allthough with and old VAG fault code reader (only one i have that can read OBD1), and the codes are for the EGR valve, short circuit. Seems weird when the EGR on this car is a vacuum unit without any electrical components... I will get different error codes if i disconnect the solenoid for the EGR (P0403), but seemingly no error codes when disconnecting the vacuum hose for the EGR. Car has a 3" (i think) cat-back exhaust... We're growing a bit tired of this problem now, been trying to fix it for 2½ years...
Submitted: 2 years ago.
Category: UK Car
Expert:  Dave Nova replied 2 years ago.
What is the trouble code that is currently setting?
Customer: replied 2 years ago.

Right now, with Everything connected, the error code is P1403 i Believe (forgot to take a pic of it), with the electrical Cable to the solenoid pulled out i get P0403.

Expert:  Dave Nova replied 2 years ago.
With the key on, do you have voltage on the Brown wire at the egr vacuum solenoid?
Customer: replied 2 years ago.

I haven't checked that out, i'll have to wait for him to come by with the car.

I'll report back to you as soon as i've checked the voltage on the Brown wire!

Expert:  Dave Nova replied 2 years ago.
Sounds good. I will look forward to your response.