Identifying Connector and missing sensors?
Thread Starter
Instructor
Joined: Aug 2020
Posts: 217
Likes: 58
From: Sonoma County, CA
Identifying Connector and missing sensors?
Problem found unfortunatey. Wrong reluctor wheel.
-------------------------------------------------------
Hi guys. I identified the connector, it was for the oil pan sensor.
However I’m not getting an RPM readout nor oil pressure. 0335 code says missing signal.
I have reseated the oil pressure switch connector twice now, no luck.
E40 ecu, 2005 C6.
Ideas and thoughts appreciated. Thanks!
-------------------------------------------------------
Hi guys. I identified the connector, it was for the oil pan sensor.
However I’m not getting an RPM readout nor oil pressure. 0335 code says missing signal.
I have reseated the oil pressure switch connector twice now, no luck.
E40 ecu, 2005 C6.
Ideas and thoughts appreciated. Thanks!
Last edited by Russdawg1; Jul 31, 2024 at 02:06 AM.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,621
Likes: 4,066
From: Cape Coral, Florida
The Tach gets its signal from the Crankshaft Position Sensor so if you have a CKP DTC it’s either a wiring issue or a bad sensor…I’m assuming you have a P0336…that’s something you’ll have to diagnose…your oil pressure issue is something different…what color wires is that 3 wire connector you pictured ??
Thread Starter
Instructor
Joined: Aug 2020
Posts: 217
Likes: 58
From: Sonoma County, CA
The Tach gets its signal from the Crankshaft Position Sensor so if you have a CKP DTC it’s either a wiring issue or a bad sensor…I’m assuming you have a P0336…that’s something you’ll have to diagnose…your oil pressure issue is something different…what color wires is that 3 wire connector you pictured ??
still have rpm and oil issue. I have a 0335 code which means missing signal? Thinking about just swapping both sensors out since they’re both old anyways.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,621
Likes: 4,066
From: Cape Coral, Florida
P0335 is a sensor “circuit” DTC and 0336 is a sensor “performance” one…similar codes…oil pressure sensor is also a 3 wire sensor…either bad sensor or wiring…if you decide to replace stick with OEM…if you decide to change the sensor you have a 50-50 shot it’s the sensor !!
Thread Starter
Instructor
Joined: Aug 2020
Posts: 217
Likes: 58
From: Sonoma County, CA
Good stuff, thank you.
I swapped the crank sensor out, and I still have 0335, but now in combination with 0340. Car refuses to crank. Just turns off until I left off the clutch now.
Forums lead me to believe voltage issue since its unlikely the camshaft sensor magically went bad.
I swapped the crank sensor out, and I still have 0335, but now in combination with 0340. Car refuses to crank. Just turns off until I left off the clutch now.
Forums lead me to believe voltage issue since its unlikely the camshaft sensor magically went bad.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,621
Likes: 4,066
From: Cape Coral, Florida
Good stuff, thank you.
I swapped the crank sensor out, and I still have 0335, but now in combination with 0340. Car refuses to crank. Just turns off until I left off the clutch now.
Forums lead me to believe voltage issue since its unlikely the camshaft sensor magically went bad.
I swapped the crank sensor out, and I still have 0335, but now in combination with 0340. Car refuses to crank. Just turns off until I left off the clutch now.
Forums lead me to believe voltage issue since its unlikely the camshaft sensor magically went bad.
Was your crank sensor OEM or some junk from Amazon or EBay ??…if you have both DTC’s set I would check your wiring.
Last edited by C5 Diag; Jul 30, 2024 at 04:54 PM.
Thread Starter
Instructor
Joined: Aug 2020
Posts: 217
Likes: 58
From: Sonoma County, CA
I resat the starter plug and 0340 went away. Just back to 0335 and cranking again. So the sensor didn't do anything unless both the installed one AND replacement are bad, lol. I wonder if since its a new motor and its never been started before it just needs to be attempted to be turned over. I'm only trying to crank it to check oil pressure atm. No spark/Fuel/etc. Something about a crank relearn? But according to that info sheet, 0335 is missing a lot of signals, not just a few.
I checked the loom and all the wires look intact. Annoying.
Do you know what voltage the oil switch produces? I think ill just run a battery onto the leads to see if the wiring is good/computer sees anything going on. Have the sensor but its a bear to install obviously so would like to avoid swapping it out.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,621
Likes: 4,066
From: Cape Coral, Florida
What “starter plug” are you referring to ??…if you want to just crank the engine over without starting just do a “clear flood crank”…hold the gas pedal to the floor while starting to just crank the engine…you need to do a “crank relearn” if replacing the crank sensor…don’t know what you mean by crank sensor is missing “a lot of signals” ??…are you using a labscope ??
Last edited by C5 Diag; Jul 30, 2024 at 04:51 PM.
Thread Starter
Instructor
Joined: Aug 2020
Posts: 217
Likes: 58
From: Sonoma County, CA
What “starter plug” are you referring to ??…if you want to just crank the engine over without starting just do a “clear flood crank”…hold the gas pedal to the floor while starting to just crank the engine…you need to do a “crank relearn” if replacing the crank sensor…don’t know what you mean by crank sensor is missing “a lot of signals” ??…are you using a labscope ??
starter solenoid has a connector on the harness. That’s the plug I was referring to.
yes I’m just trying to crank the motor to see if oil pressure builds and identify any issues (like this crank sensor code and missing oil pressure) didn’t know about the flood clear start, is it better to do it that way rather than leaving the injectors unplugged or does it make no difference?
No I’m not using a lab scope but I guess I may have to if I can’t figure out what’s going on. Missing a lot of signals = missing multiple crank pulses as indicated by the code.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,621
Likes: 4,066
From: Cape Coral, Florida
Clear flood crank is just easier to do !!…if you back probe the signal wire while cranking the engine you should see if you see maybe 2-3 volts that fluctuate if there is a signal from the sensor…you won’t see 12 volts since a DVOM averages the voltage plus there is a on/off signal…I’d also check for the 12 volt reference and reference ground with a test light connected to battery positive…if no crank sensor signal the Tach will not move while trying to start the engine.
Thread Starter
Instructor
Joined: Aug 2020
Posts: 217
Likes: 58
From: Sonoma County, CA
Clear flood crank is just easier to do !!…if you back probe the signal wire while cranking the engine you should see if you see maybe 2-3 volts that fluctuate if there is a signal from the sensor…you won’t see 12 volts since a DVOM averages the voltage plus there is a on/off signal…I’d also check for the 12 volt reference and reference ground with a test light connected to battery positive…if no crank sensor signal the Tach will not move while trying to start the engine.
Worst case scenario too. Wrong reluctor wheel when engine was built. And I didn't pay attention.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,621
Likes: 4,066
From: Cape Coral, Florida