oz10k Posted February 26, 2016 Report Share Posted February 26, 2016 I recently got a 2015 C-Max Hybrid with a bit over 14,000. I soon noticed an intermittent pull to the right. I drive the same route to/from work, so I have a feel for the road grade. At first I only noticed the pull (always to the right) during low speed braking. I'm still not sure 100% sure if it's only during regenerative braking. When it pulls, the steering wheel can move as much as 10 - 20 degrees! Then I also started to notice that if I'm coasting (at any speed) and go over a bump I'll frequently get a small pull. I have not yet noticed it pulling during acceleration. I took the car to the dealer for a Check Engine Light and asked them to look at it. Their response was that hybrid braking causes a pull. That doesn't sound right to me. So, does your call pull during regenerative braking? If so, how much? Thanks,Ron Quote Link to comment Share on other sites More sharing options...
cwstnsko Posted February 26, 2016 Report Share Posted February 26, 2016 My C-Max does not pull under regenerative braking. One test would be to put the car in Neutral during braking to see if it pulls more, or less. I don't believe there is any regen when in Neutral. I use this sometimes to clear the rust from the rotors. ptjones and obob 2 Quote Link to comment Share on other sites More sharing options...
plus 3 golfer Posted February 26, 2016 Report Share Posted February 26, 2016 Agree with cwstnsko - no regen in Neutral and no pulling during regen. The Neutral test might tell you something. I assume the dealer scanned all modules for DTC as they did find a bad purge valve. I wonder if the Electronic Power Assist Steering is causing the pull - the fact that going over a bump apparently causes a small pull. The Power Steering Control Module is self monitoring for DTCs and likely doesn't light the CEL if there is an issue that triggers a DTC in the EPAS. An input from the steering torque sensor (works by measuring the relative rotation between an input and output shaft which are connected by a torsion bar) and vehicle speed are used to determine the amount of steering assist and compensation for road pull that is applied to steering effort. A slight jolt to the output shaft could perhaps cause a larger than anticipated compensation if the sensor is somewhat faulty. IMO, if the problem persists, find another dealer and take the SA for a ride and show the SA the issue. ptjones 1 Quote Link to comment Share on other sites More sharing options...
oz10k Posted February 26, 2016 Author Report Share Posted February 26, 2016 Plus 3 Golfer - thanks for the all knowledge! I like the idea of asking the SA to for a ride. cwstnsko - I hadn't thought about putting it in neutral, that's a very good idea. Quote Link to comment Share on other sites More sharing options...
ptjones Posted February 27, 2016 Report Share Posted February 27, 2016 I have watched SOC for the HVB when in neutral with my ScanGaugeII, it only goes down, stepping on the brakes has no effect on SOC. ;) Paul Quote Link to comment Share on other sites More sharing options...
livesmith Posted March 1, 2016 Report Share Posted March 1, 2016 I recently got a 2015 C-Max Hybrid with a bit over 14,000. I soon noticed an intermittent pull to the right. I drive the same route to/from work, so I have a feel for the road grade. At first I only noticed the pull (always to the right) during low speed braking. I'm still not sure 100% sure if it's only during regenerative braking. When it pulls, the steering wheel can move as much as 10 - 20 degrees! Then I also started to notice that if I'm coasting (at any speed) and go over a bump I'll frequently get a small pull. I have not yet noticed it pulling during acceleration. I took the car to the dealer for a Check Engine Light and asked them to look at it. Their response was that hybrid braking causes a pull. That doesn't sound right to me. So, does your call pull during regenerative braking? If so, how much? Thanks,Ron I'm amazed at some of the crud these dealerships try to get away with. That's completely false. Mine doesn't pull under any circumstances other than maybe accelerating to the point of slipping the tires. Why would hybrid braking make it pull? Pretty sure you wouldn't want to release a vehicle that pulled every time you slowed down or coasted... I'd check tire pressures, brakes and suspension components. obob 1 Quote Link to comment Share on other sites More sharing options...
ptjones Posted March 2, 2016 Report Share Posted March 2, 2016 I wonder if the front right brake is working when it shouldn't? Compare the disks surfaces right and left to see if they look the same. ;) Paul obob 1 Quote Link to comment Share on other sites More sharing options...
RobMax Posted March 27, 2016 Report Share Posted March 27, 2016 No pulling during normal braking from any speed here. Hybrid cars, like any other non-hybrid cars, don't normally do that if there aren't any problems. Dealership tech or service writer is an idiot or liar for saying that. Take a look under the car and see if there's anything amiss. Check for a problem with the suspension, braking components, leaking fluid, unevenly worn tire on the side it pulls on, etc. Quote Link to comment Share on other sites More sharing options...
WNY Posted March 27, 2016 Report Share Posted March 27, 2016 mine doesn't pull at all on re-gen braking. Bad strut, hanging caliper, rusty rotors, low tire pressure, could be anything with that side that is pulling. Quote Link to comment Share on other sites More sharing options...
Marc Smith Posted March 29, 2016 Report Share Posted March 29, 2016 A month later. no follow up from the OP. hopefully he's not going around in circles... obob and ptjones 2 Quote Link to comment Share on other sites More sharing options...
Steve1945 Posted March 4, 2018 Report Share Posted March 4, 2018 My C-Max does not pull under regenerative braking. One test would be to put the car in Neutral during braking to see if it pulls more, or less. I don't believe there is any regen when in Neutral. I use this sometimes to clear the rust from the rotors. My C-Max has started pulling to the right during braking. I tried applying the brakes in neutral and there was no pulling. I guess I have a problem with the regenerative braking system. ptjones 1 Quote Link to comment Share on other sites More sharing options...
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