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chevybill
New User
| Posts: 1
| Joined: 04/07
Posted: 04/14/07
05:16 PM
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1996 Chevrolet C1500 185,000 miles
Engine: 5.7L V8 SFI VORTECOHV
Transmission: 4L60E Turbo Hydramatic
I am consistently getting "Service Engine Soon" codes that seem to be transmission related:
P0753
P0758
P1864
P1860
P1886
At the same time the codes appear both tachometer and speedometer drop to zero and the shift inicator light (showing which gear is selected) goes off. The vehicle drives just fine, but does not seem to feel that it is shifting through the gears properly. In other words, there seems to be a lack of shifting. This is intermittent but very persistent.
A local transmission repair shop thinks that because there are so many different codes that the problem is probably electrical and very difficult to trace because it is not constant.
Any ideas?
Thank you very much.
...Bill
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Posted: 04/14/07
07:47 PM
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bad ignition switch, you can replace for around 300 bucks at tranny shop or repair shop. you can install a relay to prevent future failure I have seen the fuse box jumped to keep power on when key is turned on, just use another fuse source to replace the power loss from bad switch.It is very common....
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Posted: 04/16/07
12:53 AM
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You shouldn't even need to replace the ignition switch as I've seen this problem a lot and it has a simple fix. Get a garage to install a relay that will give you keyed power to pin E on the trans wiring harness.
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