- Joined
- Aug 4, 2021
- Messages
- 1,283
Had this in another thread, but thought I'd ask over here.
P0121 TPS pending code.
TPS was cheap enough, decided to fire the part cannon a little, and replaced the TPS!
No joy though.
Did some testing while the motor was Idling high.
It looks like I am losing my TPS low reference from TPS terminal "B" back to the ECM's commanded ground.
I've inspected for rodent damage at the air box where the ECM resides, no family of critters present. I've done a wiggle test everywhere that I can see with the car good and warmed up.
Looking at the schematic it appears to me that the low reference return ground to the ECM from the TPS is not shared by any other sensors. If I can't find this intermittent open to my low reference return ground, do you guys in the know, see any issue with just piggybacking a wire along the harness from the TPS to the ECM?
Really not the way I wanted to fix it but I'm sort of running out of ideas!
Issue is intermittent have been driving for a good half hour today and idle and transmission is shifting fine ATM.
P0121 TPS pending code.
TPS was cheap enough, decided to fire the part cannon a little, and replaced the TPS!
No joy though.
Did some testing while the motor was Idling high.
It looks like I am losing my TPS low reference from TPS terminal "B" back to the ECM's commanded ground.
I've inspected for rodent damage at the air box where the ECM resides, no family of critters present. I've done a wiggle test everywhere that I can see with the car good and warmed up.
Looking at the schematic it appears to me that the low reference return ground to the ECM from the TPS is not shared by any other sensors. If I can't find this intermittent open to my low reference return ground, do you guys in the know, see any issue with just piggybacking a wire along the harness from the TPS to the ECM?
Really not the way I wanted to fix it but I'm sort of running out of ideas!
Issue is intermittent have been driving for a good half hour today and idle and transmission is shifting fine ATM.