Check Engine light 1996 LT1

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Jan 31, 2012 | 03:06 PM

needhamboy

Thread Starter

Instructor

Joined: Sep 2011

Posts: 153

Likes: 12

From: Cape Cod, Ma

Check Engine light 1996 LT1

I purchased my 1996 limited edition convertible in October 2011 and it ran great. The check engine light just came on so I took it to Advanced Auto Parts for a free diagnostic check.

It showed codes:
P0138 (Oxygen sensor circuit high voltage) Bank 1, sensor 2
P0140 (Oxygen sensor circuit no activity detected) Bank 1, sensor 2
P0171 Bank 1, system too lean
P0174 Bank 2, system too lean
P1371 Mfg code

Can anyone tell me what this means?

Jan 31, 2012 | 04:30 PM

96GS#007

Race Director

Joined: Apr 2000

Posts: 15,344

Likes: 4,008

From: Texas

Quote:

Originally Posted by needhamboy

It means the aft o2 sensor on the drivers side is bad, or the wiring to that sensor is bad, or the cat on that side is bad. 9 times out of 10 it's just the sensor.

Jan 31, 2012 | 06:12 PM

0Paul Ruggeri

Former Vendor

Joined: Nov 2006

Posts: 2,482

Likes: 3

From: Carmichael ca

Replace B1S2, clear the codes and see if any come back.

Feb 2, 2012 | 10:11 AM