2014 Chevy Cruze ltz 1.4 turbo Crank no start with exhaust cam sensor plugged in

Hey juergen,

I was half awake with the last response so yes that is a valid point and I will check that out.

Very true Cheryl

code was a p0365 so I will look into that as a precaution.

Can I ask what your crank sensor is doing when the cam is plugged in? They generally run on the same reference ckt. Does the pcm see it cranking, should be able to see either the tach or on a scan tool.

Pcm sees it cranking, good wave form, ckp counts increment. Circuits are separated entirely all the way back to pcm.

As you now know, this is a normal signal bias voltage with the sensors unplugged.
Now on to the problem, it is a no start unless the exhaust cam is unplugged. What codes did you have before you started unplugging and testing sensors?
When I have seen a problem like this, it was a correlation problem with the cam/crank sensors. As in jumped timing belt/chain or as Cheryl said, a slipped tone ring. I would think you would have had some correlation codes but maybe not.

Here are the codes it had before I checked anything.

Engine
P0137 | HO2S Circuit Low Voltage Sensor 2 (Symptom 00) - Test Failed Since DTC Clear, Test Not Passed Since Power Up.
P015B | HO2S Delayed Response Rich To Lean Sensor 2 (Symptom 00) - Test Failed Since DTC Clear, History DTC, Test Not Passed Since Power Up.
P0299 | Engine Under Boost (Symptom 00) - Test Failed Since DTC Clear, History DTC, Test Not Passed Since Power Up.
P0365 | Exhaust Camshaft Position Sensor Circuit (Symptom 00) - Current DTC, Test Not Passed Since DTC Cleared, Test Failed Since DTC Clear, History DTC, Test Not Passed Since Power Up, Warning Indicator Requested.

Airbag
B1325 | Control Module Power Circuit Voltage Below Threshold (Symptom 03) - History DTC.
U0184 | Lost Communication With Radio (Symptom 00) - History DTC, Test Not Passed Since Power Up.

Body Control Module
B1517 | Battery Voltage Voltage Below Threshold (Symptom 03) - Test Failed Since DTC Clear, History DTC, Test Not Passed Since Power Up.
B3883 | License Plate Lamp Circuit Short To Battery (Symptom 01) - Test Failed Since DTC Clear, History DTC.
B3883 | License Plate Lamp Circuit Short To Ground (Symptom 02) - Test Failed Since DTC Clear, History DTC.
B3883 | License Plate Lamp Circuit Open Circuit (Symptom 04) - Test Failed Since DTC Clear, History DTC.
C0755 | Right Front Tire Pressure Sensor Too Few Pulses (Symptom 29) - Current DTC, Test Failed Since DTC Clear, History DTC, Test Not Passed Since Power Up, Current DTC Since Power Up.
U0168 | Lost Communication With Keyless Entry Control Module (Symptom 00) - Test Failed Since DTC Clear, History DTC, Test Not Passed Since Power Up.

Keyless Entry
B3120 | Keyless Entry Antenna 2 Short To Battery Or Open (Symptom 05) - Current DTC, Test Not Passed Since DTC Cleared, Test Failed Since DTC Clear, History DTC, Test Not Passed Since Power Up.

Tire Pressure Monitor
B1517 | Battery Voltage Voltage Below Threshold (Symptom 03) - Test Failed Since DTC Clear, History DTC.
B3883 | License Plate Lamp Circuit Short To Battery (Symptom 01) - Test Failed Since DTC Clear, History DTC.
B3883 | License Plate Lamp Circuit Short To Ground (Symptom 02) - Test Failed Since DTC Clear, History DTC.
B3883 | License Plate Lamp Circuit Open Circuit (Symptom 04) - Test Failed Since DTC Clear, History DTC.
C0755 | Right Front Tire Pressure Sensor Too Few Pulses (Symptom 29) - Current DTC, Test Failed Since DTC Clear, History DTC, Test Not Passed Since Power Up, Current DTC Since Power Up.
U0168 | Lost Communication With Keyless Entry Control Module (Symptom 00) - Test Failed Since DTC Clear, History DTC, Test Not Passed Since Power Up.

As you can see no correlation codes etc even though it has a laundry list of issues though most were from owner trying to figure out what was preventing the car from starting.

current reviewing waveforms as I took quite a few so hopefully I find something will post a pic in the morning.

If it were me I’d still find a known good cam crank relationship on iatn check anyway to rule it out for good. Will the sensor bolt on from intake to exhaust? Maybe try swapping them?

wrote:

If it were me I’d still find a known good cam crank relationship on iatn check anyway to rule it out for good. Will the sensor bolt on from intake to exhaust? Maybe try swapping them?

agree 100%

When you clear codes, does it continue to set the exhaust cam sensor fault?

Alrighty then after going through 20 plus waveform files I caught it messing up once

What’s it look like when it messes up? Drop out? Stuck high?

Sticks high and low tried posting a pic but keeps bringing up mimi file error it's a jpg file

Make sure your not dropping the 5 volts or ground. Use 3 channels on the scope or just 2. One hooked to 5 volt ref and ground and other to signal

Hardtopdr2, the whole mimi error has been cropping up recently. I've found that using PNG instead of JPG gets around it. Sorry for the hassle.

i even reduced it in size below 5 mb (4.52 mb) in png and still no go on upload lol

ok managed to put it as a pdf finally it is zoom out to show the whole capture 

Make sure you ain’t losing 5 volt ref and low reference. If it’s that intermittent I’d be half tempted to throw a new gm sensor in

Is the intake and exhaust cam sensors the same part number? Maybe try swapping them

I looked that up today and it looks like it is the same part number

wrote:

Hardtopdr2, the whole mimi error has been cropping up recently. I've found that using PNG instead of JPG gets around it. Sorry for the hassle.

I have Luke on this!