p3449, p3441, p3425, p3401, p0443, p1682, p2101, p0102, p0689, what could be wrong, the pcm/evu bad?

Question

My fiance has a 2006 gmc Yukon Denali with about 170,000 miles. It broke down 2 weeks ago and her dad put a new battery in it because hers died. Drove fine for 2-3 days and broke down again. Her check engine light came on and all those codes were on it the ecu. From what I've read it maybe the pcm/ecu but I am not sure. Please help me

Answer 1

P3449 Cylinder 7 deactivation solenoid control  circuit

P3441 Cylinder 6 deactivation solenoid control  circuit

P3425 Cylinder 4 deactivation solenoid control circuit

P3401 Cylinder 1 deactivation solenoid control circuit

P0443 Evaporative emission (EVAP) purge solenoid control circuit

P1682 Ignition 1 switch circuit 2

P2101 Throttle actuator position performance

P0102 MAF Sensor circuit low frequency

P0689 Computer and control system relay circuit low

The ECM be the problem , NO.  that's to soon to make that assessment. The deactivation circuit ,to diagnose this you test drive the vehicle for deactivation. You have one main problem that is common to all the code set and that P1682 is the power train / relay this is what power the deactivation circuit, and the MAF and the throttle actuator. P0689 that the other problem that ignition control relay circuit

Two code stand out P1682 and P0689. Check the charging system make sure the system is charging. Just for the sake of diagnosis replace the EC relay. or the ignition 1 voltage powertrain/relay.

Read more : https://www.autocodes.com/p3449.html

Read more : https://www.autocodes.com/p3441.html

Read more : https://www.autocodes.com/p3425.html

Read more : https://www.autocodes.com/p1682_chevrolet.html