Customer brought me in a car that has these codes after someone changed the engine for them. 2010 Prius V3 210k miles Engine had a blown headgasket previously Now granted unlike myself the person used every bracket and wire clamp and it looks flawless but the A/C no longer works and throws hybrid code but the traction battery is perfect and the MAP is getting the correct voltage and ohms but keeps throwing a code so it's looking like an ECM fault to me or bad ground continuity Also the 12 volt drains after sitting for long periods ( Not the ABS pump running constantly ) Any ideas would be appreciated Posted via the PriusChat mobile app.
Had exact and mileage on my persona .with exact scenarios described. 12V was questionable and HV battery was nearing time . AC would code . I unplugged diagnosed my running and burping coolant and general getting car running . About 4 days later with car off plugged up compressor HV plug immediately got in the car turned the air conditioning on low full fan etc drove around for about I don't know 30 minutes to my next call and it's never coded since. I was about to change the air conditioning compressor thinking something was internally electrically wrong with it It's still running today about 2 years later.
I'm debating swapping the 12v and I've already checked the fuse in the inverter with ac on and off voltage is as should be but compressor never comes on I'm going to have to trace back wiring to see if he skipped something of its a bad connection As far as the map sensor coding out It could be as simple as a split ground from moving the harness replacing the engine cutting the ground continuity off I'm shooting in the dark Posted via the PriusChat mobile app.
