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The 8th Gen Riviera Resource
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| | | p0703,p1257 |  |
| | | Author | Message |
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Rivieraz
Enthusiast
Name : tommy z
Age : 56
Location : the Burgh
Joined : 2019-01-08
Post Count : 227
Merit : 1
| | Subject: p0703,p1257 Tue Oct 20, 2020 11:07 am | |
| my engine light came on the other day but when i ran my Actron CP9690 it said no codes so i bought a tech 2 clone it came up no codes as well,but in the history it had p0703 and p1257, im going to do some research in my FSM but any help is welcome the car is driving fine even when the engine light came on, also is there any videos on learning how to use a tech 2 scanner for our cars???Hope everyone is well take care thanks for reading!
Last edited by Rivieraz on Tue Oct 20, 2020 1:44 pm; edited 1 time in total (Reason for editing : spell check) | |
| | | | LARRY70GS
Aficionado
Name : Larry
Age : 67
Location : Oakland Gardens, NY
Joined : 2007-01-23
Post Count : 2186
Merit : 149
| | Subject: Re: p0703,p1257 Tue Oct 20, 2020 1:07 pm | |
| Check your brake switch. Do you have brake lights?
the 1257 is supercharger over boost. Do you have a boost gauge?
_________________
98 Riviera SC3800 All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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| | | | Rivieraz
Enthusiast
Name : tommy z
Age : 56
Location : the Burgh
Joined : 2019-01-08
Post Count : 227
Merit : 1
| | Subject: Re: p0703,p1257 Tue Oct 20, 2020 1:48 pm | |
| my brake lights work,reverse lights work. i dont have a boost gauge but will a tech 2 scanner work? Also what is the switch right above the brake switch it has a vacuum or hose connected to it? | |
| | | | LARRY70GS
Aficionado
Name : Larry
Age : 67
Location : Oakland Gardens, NY
Joined : 2007-01-23
Post Count : 2186
Merit : 149
| | Subject: Re: p0703,p1257 Tue Oct 20, 2020 2:52 pm | |
| The brake light switch disengages the cruise control and torque converter clutch I believe. Your tech 2 should read EVERYTHING. 
_________________
98 Riviera SC3800 All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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| | | | Rivieraz
Enthusiast
Name : tommy z
Age : 56
Location : the Burgh
Joined : 2019-01-08
Post Count : 227
Merit : 1
| | Subject: Re: p0703,p1257 Tue Oct 20, 2020 3:15 pm | |
| thanks LARRY70GS everyone is always very helpful here! | |
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