07 Equinox Crankshaft sensor code P0336

[ReaganBob]

*07 Equinox - Losing Power, Tach drops to 0

2007 Equinox LT, 3.4L V6, 189,000 miles.

A few months ago, I replaced my left front axle shaft as the boot had cracked. In doing so I broke a transmission seal and lost some fluid. I made an appointment with the dealer to have the transmission looked at a few days later. Before the appointment, I noticed that while driving with the engine still "cold", my tachometer would waver and suddenly drop to 0; the car remained running, but I lost almost all acceleration. I had to pull over and restart the car (which took a few tries) before I could get back on the road.

I notified the dealer about this and while they repaired the seal and replaced my transmission fluid, they could not replicate the power loss I was experiencing.

Since then, I having been having this issue every time I drive the car. The only difference appears to be when I warm up the engine until the temperature indicator is nearly at the halfway mark - if I then drive, I don't seem to have the problem.

Then just this week, the check engine light came on. I pulled the following codes:

P0336 (Crankshaft position sensor range / Performance
Also me remote start stopped working.


My DIY experience is limited with respect to drivetrain, so any guidance anyone can provide on the above codes and whether the current issues I'm facing are related to these codes would be helpful.

Thanks in advance.

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[ReaganBob]

So i replaced the senser and no change. Took it ti the dealer and had the sensor calibrated and still no change.

[Ruley73]

Originally Posted by ReaganBob

So i replaced the senser and no change. Took it ti the dealer and had the sensor calibrated and still no change.

Have the battery & alternator checked.
Disconnect & inspect plugs at the ECM.
Disconnect & inspect plugs under the underhood fuse block.
Check ECM grounds and main battery ground connections.
Check integrity of wires going to crankshaft position sensor.

I'm thinking that you have a power issue that is affecting the 5V reference signal supplied by the ECM.

[ReaganBob]

Thank you! Ill give it a shot tomorrow and let you know how it goes.

[ReaganBob]

Found thw problem. Rust was forming between the sensor and the engine block pushing the sensor away from the reluctor causing the sensor to get erratic readings. Pulled the sensor out, chipped the rust off with a hammer, reinstalled the sensor, problem solved.

[Ruley73]

Originally Posted by ReaganBob

Found thw problem. Rust was forming between the sensor and the engine block pushing the sensor away from the reluctor causing the sensor to get erratic readings. Pulled the sensor out, chipped the rust off with a hammer, reinstalled the sensor, problem solved.

Glad to hear you found the problem. Thank you for following up and posting the solution.