Check engine light blinking and traction control

Asked by Chris May 20, 2018 at 08:11 PM about the 2007 Chevrolet HHR LT FWD

Question type: Maintenance & Repair

I have a 2007 Chevy HHR I went to the
store this morning and when I pulled up at
the store and started running real rough the
check engine light came  on blinking and
the traction control light come on  and says
service traction control .  It has no power
and the light still blinking and shifting real
hard any ideas what it could be

9 Answers


You have a misfire. Have code read

2 people found this helpful.

It has a p0300 code any idea what I need to do to fix it


Here's a video that talks about P0300 code..could be se veral things...spark plugs at 2 or more are bad...fuel filter or pump(low fuel pressure can cause random misfire)...chk the battery if its weak it can cause it too. Also could be a broken vacuum line...or leak around exhaust manifold.

10 people found this helpful.

I’m having a very similar issue, have you gotten your resolved?

2 people found this helpful.

After replacing all lifters, four valves, and Vlom and it still messing up after driving for 15-20 minutes. I realized it maybe didn’t have enough oil pressure to execute cylinder deactivation so I took it to a shop and had him unlock the ecu and delete the afm feature. Now it drives great. The bullshit of it is that a gm store will tell you need a new motor And so will GM enigneers even though they know they could just delete but they won’t. The gen4 5.3 motor was designed to do cylinder activation by using oil pressure, which it robs from the motor. The gen3s didn’t do this and they can rub 3-400k miles the gen4 motors will only run 120-150k miles before the oil pump is worn down enough to where it can’t provide enough pressure to execute cylinder deactivation. I’m not a tech and I’m just going off what my guy is telling me. I’m hoping this helps y’all.

8 people found this helpful.

GM has a recall on the Throttle Positioning sensor Makes it run like crap with loss of power. Might want to look into that. My code was P2135 2009 Chevy Avalanche 5.3 flex fuel eng..

2 people found this helpful.

I think sensors all start failing after 10 yrs and I'll be trading mine in. Loved it for 10 yrs but $3K in repairs last year and now tire sensor and ECU both need service? What next? How many post-its do you have to use to cover alarms, LOL. I'm done. Will miss it a lot. Also leaks in rain/snow into both driver and passenger sides now so complementary steam up when sun comes out. . .

1 people found this helpful.

BTW, this is a 2008 Chvy HHR, sorry I didn't clarify before.


I have a 2008 HHR LT. Chevrolet & the problem that iam having is that the engine light will come out & say engine reduce power so the car starts to slow down to a point is stops so many attempts to start it up but stops again it start & works when it wants

3 people found this helpful.

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