Codes 15 and 22 won't go away
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Junior Member
Joined: Jan 2019
Posts: 23
Likes: 5
From: Delaware
Car: 1991 TA GTA WS6
Engine: 305
Transmission: 700r4
Axle/Gears: 3.73
Codes 15 and 22 won't go away
91 GTA 305 TPI. Changed CTS, set TPS to .54 Volts. Installed another braided ground strap from the block to the strut tower.
Disconnected the battery touched cables for 30 seconds. Running the factory 195^ Thermostat. Still can't shake the codes.
CEL comes on 5 seconds after starting the car. She starts up fine in the cold and runs great. Bad ECM????????
Disconnected the battery touched cables for 30 seconds. Running the factory 195^ Thermostat. Still can't shake the codes.
CEL comes on 5 seconds after starting the car. She starts up fine in the cold and runs great. Bad ECM????????
Joined: Dec 2004
Posts: 16,734
Likes: 993
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Codes 15 and 22 won't go away
Sounds like it could be a bad ecm. Especially since you have verified the cts reading and tps voltage.
a 1228746 are fairly cheap. Just transfer over your prom.
https://www.ebay.com/itm/89-90-91-92...oAAOSwqj5bbh4H
a 1228746 are fairly cheap. Just transfer over your prom.
https://www.ebay.com/itm/89-90-91-92...oAAOSwqj5bbh4H
Joined: Dec 2004
Posts: 16,734
Likes: 993
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Codes 15 and 22 won't go away
tps should not have elongated holes for adjustment if it does try .67-.76
a link to a replacement ecm
https://www.ebay.com/itm/Engine-ECM-...gAAOSwY4JcPOsA
Last edited by Tuned Performance; Jan 30, 2019 at 05:03 PM.
Joined: Dec 2004
Posts: 16,734
Likes: 993
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Codes 15 and 22 won't go away
Looks like the grounds on the tps and cts are separate. The ecm grounds behind the passengers side cylinder head.
you should check to make sure it’s a clean and tight connection.
Last edited by Tuned Performance; Feb 25, 2019 at 05:58 PM.
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