My 2013 Automatic (140,000 miles) has started developing some odd behaviors.
When driving, while not accelerating/decelerating, the engine sounds muffled and feel sluggish. If I punch it, the Transmission drops a gear and the engine has it's normal pep. There is no CEL, but it's throwing lots of random codes: P0481, P0505, P0661, P0662, P1260, U3000, P0744, P0751, P0752, P0753, P0756, P0757, P0758, P0761........ The list goes on. My Favorite is P1260 - THEFT Detected, Vehicle Immobilized. If I clear the codes, it seems to go longer before throwing them again with the AC off. Watching the OBD voltage with a scanner it varies between 12.7v and 13.8v. There is a definite dip when the AC clutch engages. Recently it has started hesitating to turn over when starting. Interstate tested the battery, and told me it's good. Advanced Auto tested battery/alternator/starter and told me the battery is bad, the alternator good, and with a bad battery they can't tell me if the starter is good or bad. The employee didn't seem very comfortable with the testing tool. So.... maybe the battery is bad? I'm not monitoring gas mileage, so I can't speak to that. Within the past 6 months I replaced the TCM because the old one was starting to put me in limp mode due to heat soak. I have also recently (past 6 months) replaced the plugs, cleaned the MAF, new air filter, power steering fluid, the front shock assemblies, but I doubt those are related.
I plan to put the old TCM back in to rule that out. Any other thoughts? Maybe AC clutch? How would I test the AC clutch?
Isn't electricity fun?
When driving, while not accelerating/decelerating, the engine sounds muffled and feel sluggish. If I punch it, the Transmission drops a gear and the engine has it's normal pep. There is no CEL, but it's throwing lots of random codes: P0481, P0505, P0661, P0662, P1260, U3000, P0744, P0751, P0752, P0753, P0756, P0757, P0758, P0761........ The list goes on. My Favorite is P1260 - THEFT Detected, Vehicle Immobilized. If I clear the codes, it seems to go longer before throwing them again with the AC off. Watching the OBD voltage with a scanner it varies between 12.7v and 13.8v. There is a definite dip when the AC clutch engages. Recently it has started hesitating to turn over when starting. Interstate tested the battery, and told me it's good. Advanced Auto tested battery/alternator/starter and told me the battery is bad, the alternator good, and with a bad battery they can't tell me if the starter is good or bad. The employee didn't seem very comfortable with the testing tool. So.... maybe the battery is bad? I'm not monitoring gas mileage, so I can't speak to that. Within the past 6 months I replaced the TCM because the old one was starting to put me in limp mode due to heat soak. I have also recently (past 6 months) replaced the plugs, cleaned the MAF, new air filter, power steering fluid, the front shock assemblies, but I doubt those are related.
I plan to put the old TCM back in to rule that out. Any other thoughts? Maybe AC clutch? How would I test the AC clutch?
Isn't electricity fun?