2016 Volvo XC90: start-stop system problems

Filed Jun 7, 2024 · Engine · LA

We are a repair facility and the vehicle arrived for a concern with a weak battery and a battery warning light. The battery was testing bad and was replaced but the other issues persisted. The vehicle was scanned for codes and the codes present in the computer were B139F11, P26DC00 & P059700. After researching these codes we discovered a technical service bulletin related to the same issue and codes (Ref. No: TJ 30268.6.0). The bulletin states "If any of above DTC´s are set in the ECM or CEM for the pre-heated thermostat in the cooling system, and/or if the customer complains of a charging system warning message in the Driver’s Information Module (DIM), follow advice under SERVICE". The bulletin then describes the required service "Replace the thermostat according to instructions in VIDA and erase DTC. Not replacing the thermostat can cause consequential damages". After reading this we followed the service in the bulletin and replaced the thermostat but the issue persist. At this point we have replaced multiple components in compliance with the service bulletin but the battery warning light is still displayed as well as auto start stop disabled & the A/C blower not operating correctly. The bulletin also states that if the issue persist to "submit a vehicle report using function group 2627" but it does not state where the report can be submitted.

Filed Jan 11, 2024 · Electrical · NJ

When driving and stop in a traffic light, for example, the Volvo ignition going off and I have to re-start it. The problem is rooted probably in the fuse associated with Volvo's stop/start motor. I found that other models have had the same problem, like the recall#R39574 and the reference safety campaign #15V555000.If the fuse blows in traffic, it could increase the risk of an accident, especially a rear-end collision.

Filed Sep 6, 2019 · Electrical, Engine · 50,000 miles · PA

Stop/start battery failed. Leaked acid. Caused excessive and intense foul fumes into passenger compartment. Made the car intolerable to be in without opening windows and moon roof.

Filed Jan 15, 2017 · Brakes, Electrical · 300 miles · GA

2016 xc90, engine is decelerating on street road going from 40-45 miles per hour, to 10 miles per hour suddenly and quickly. With closure of back door where there is no lock button to hit by accident, car is locking all doors by itself when closing the passenger door. I am aware of babies being locked in the cars due to this fault in system and my pet was locked in due to the locks locking on their own when I closed passenger door which does not have a lock button I could have hit by accident. Front end crash going off and slightly braking on highway and on city streets when it should not, nothing in front of car numerous times and is not going off when it should for instance someone cutting car off within 2 feet several times. Dashboard screen goes blank while driving meaning you can not see speed, etc.. Literally every function on car randomly does not work. Battery/alternator is not recharging/maintaining charge long enough to keep auto start/stop engine feature working, which means 3.5 miles more per gallon for me with my extremely careful, not riding gas pedal into lights. Some say foot detection module is draining rear battery. It has been worked on 7 times with less than 5,000 miles. Others online have described same issues. I have invoices of taking into dealer each time. I have never reported any faulty product but am very concerned for safety features will randomly and actually do not work while driving. You ask when started- vehicle purchased in april 2016 and has been from the beginning with no remedies. I have gotten extremely low battery signals and warnings that my car will shut down in a few minutes. They seem to have taken away that warning in the latest software update because my car has less charge at times then when I originally received the warning. In other words, I no longer get the warning even when my battery is very low.

Filed Apr 26, 2016 · Body, Brakes · OH · crash

While driving on a city street I put the car in eco mode. The car was moving at the time. I noticed that the car seemed to be driving loudly. As I turned left, I saw the car was in manual mode and was in first gear. So I took my foot off of the brake to slow down the car and try to put it into drive. As I tried to move the gear shifter, the car came to a complete, sudden stop. It felt like all four wheels were suddenly and immediately locked. I could not move them, even as I hit the gas. I did not see any indication on the dashboard that the emergency brake had been activated. I had not fiddled in any way with the button that allows me to change to eco mode or with the parking brake. In the moment immediately preceding the stop, I had my left hand on the steering wheel and my right hand on the gear shifter. The person behind me rear-ended me. The damage to my car was minimal. I had been the first person in the line to turn left, so there was no one in front of me. I am not sure how I was able to get the car started again. I think I turned the stop/start button a couple of times. I later attempted to recreate the automatic stop. Before making a left turn, I put the car into eco mode. As I turned, I slowly released the gas and slowly braked. The car again came to an immediate stop, as though all 4 wheels were locked at the same time. When then happened, I managed to get the car going again, and the next time I put my foot on the brake, the car came to a screeching halt again. I have not been able to recreate this scenario since then, including while trying to drive the car with a dealer rep. The dealer had a technician come in from ky, and he was not able to find any problems.

Filed Dec 8, 2015 · Driver assistance, Engine · 650 miles · CA

I was driving on the freeway in rush hour traffic in eco drive mode with the auto start/stop function enabled. The auto stop kicked in and stopped my engine, but when I went to press on the gas pedal, the auto start did not restart my engine and the gas pedal was unresponsive. No alerts or warnings popped up - everything remained on (headlights, radio, etc), and nothing appeared wrong except for the fact that the car wouldn't move/accelerate. I was going around 1mph at this point, and pulled over to the shoulder, parked, and restarted the engine manually. I then drove home without further incident. I brought in the car to the dealer the next day. The response was that there was nothing to fix b/c no codes showed up during the diagnostic, and they weren't able to replicate the issue. They downloaded "software 1 and 2" and said that might fix the problem but they don't know. They said corporate doesn't tell them what the software updates do, but it seemed like the update mainly pertained to the radio which clearly has nothing to do with my issue. They tried to return the vehicle to me a week later (11/27) and I refused, and asked them to escalate the issue b/c I didn't feel the car was safe and there was no resolution. They assured me that corporate's field tech specialist was consulting with them on the phone and agreed the car was fine to be returned to me b/c there were no codes and the issue couldn't be replicated. I spoke to corporate (volvo north america) and they said they would escalate on their side but had no specific details to reassure me the problem was taken care of. I asked for a flight computer to be installed to log the car data in case the issue happens again, and no answer on that request so far. I got the car back today (12/8) b/c they don't know how/what to fix. The dealer has mechanics and not the software engineers that need to look at the car.