# Chevy hhr mystery

**URL:** <https://community.cartalk.com/t/chevy-hhr-mystery/156942>\
**Category:** Maintenance/Repairs\
**Created:** [January 20, 2020, 11:01pm UTC](https://community.cartalk.com/t/chevy-hhr-mystery/156942 "2020-01-20T23:01:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![nyteovvl\_162349](https://avatars.discourse-cdn.com/v4/letter/n/e480ec/32.png) [@nyteovvl\_162349](https://community.cartalk.com/u/nyteovvl_162349)\
**Post date:** [January 20, 2020, 11:01pm UTC](https://community.cartalk.com/t/chevy-hhr-mystery/156942/1 "2020-01-20T23:01:21Z")

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I have a 2009 hhr that ive had for nearly 4 1/2 years. Been a great car but I have a mystery. Check engine light came on after I had it for a few months. Nothing seemed to be amiss and the car ran great. Took it on a lot of day trips (400 miles round trip) and with money tight,as long as it ran fine,I left it alone. Well when I finally had some time I checked it with an obd scanner and it shows a p0016 and p0017. Has been 4 years this way and I havent had any problems. When I had the money, I replaced the cam position sensors and I changed both of the cam actuators. The car is still slow to start. Like 2 or 3 key turns to get it running and only after I step on the gas. After its warmed up though she starts on the first turn of the key and have no problems. Its only after she sits for a long period of time like 8 hours or overnight when Im at work, that shes doing this. Any thoughts? If it was a timing chain issue, would it even catch at all? Or given out in the last 4 years?

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [January 20, 2020, 11:06pm UTC](https://community.cartalk.com/t/chevy-hhr-mystery/156942/2 "2020-01-20T23:06:38Z")

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The next time you go to start the engine after the vehicle has sat for a while, turn the ignition switch to on so the dash lights come on for two seconds, and then turn the ignition switch off.

Repeat this a half dozen times and then try starting the engine.

If the engine starts right up, it points to a problem with the anti drain-back valve in the fuel pump.

Tester

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**Author:** ![nyteovvl\_162349](https://avatars.discourse-cdn.com/v4/letter/n/e480ec/32.png) [@nyteovvl\_162349](https://community.cartalk.com/u/nyteovvl_162349)\
**Post date:** [January 21, 2020, 6:47am UTC](https://community.cartalk.com/t/chevy-hhr-mystery/156942/3 "2020-01-21T06:47:14Z")

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Thanks, I’ll give that a try.

Jonathan Hay