Camshaft position sensor error code

I have an 07 tacoma trd have had no issues until last week check engine light turned on checked code got the camshaft position sensor code I replaced both of the sensors and the check engine light turned off until today it turned back on and throwing same codes the truck runs fine but now it is just not starting the easiest clearly because if the sensors but I just am unsure of what to do now I'm going to pull both sensors get a multi meter test the wires on plug anybody have another suggestions or idea this is really screwing me up with work I have to tow my boat daily for work and do not want to keep running it with this issue

 

What is the code number(s) your getting?

 

P0340 and p0343

 

Other than checking the wiring the only way to verify correct cam sensor operation is with an oscilloscope.
I'd inspect the wiring closely especially right at the cam sensor connector, make sure it passes the tug test.
Both codes are for the bank 1 (passenger side) sensor.

 

Yes both say Bank 1 after I initially replaced both sensors the light went away and everything was good that lasted about 3 days great this is totally what I need right now thank you for the tips and as far as I'm able to see the wiring all looks fine at the sensor clip end any ideas on why it might still be giving me the same issues

 

Possibly a defective sensor, did you use OE sensors or aftermarket?

 

I replaced both the ones I got at auto parts store were both Denso's I just pulled them both out cleaned the oil off them cleaned connectors put everything back together and now check engine light is off again? I have no clue hopefully it's all set now the truck runs great but I can feel a bit more power now though

 

As stated above you will need an o-scope to properly check the signals going to the ECM, But you can verify the wiring is intact and sound with a meter, see below.

P0340 - Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)

•Input voltage to ECM remains 0.3 V or less, or 4.7 V or higher for more than 5 seconds, when 2 or more seconds have elapsed after turning ignition switch ON (2 trip detection logic)
•No VVT sensor signal to ECM during cranking (1 trip detection logic)

P0343 - Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)

Output voltage of VVT sensor 4.7 V or more for 5 seconds (1 trip detection logic)

Trouble Areas to investigate:

•Open or short in VVT sensor circuit
•VVT sensor
•Camshaft timing pulley
•Jumped tooth of timing chain
•ECM

How to check wiring:

 

Check with an O-scope and Voltage at the sensors.

 

Keep an open mind and don't get tunnel vision on only an electrical issue.

It could be a mechanical issue with the timing pulley or timing chain....

 

Thanks for all the input guys I'm getting the meter today and might go buy the scope to look inside I'll post again with my findings.and ofcourse the check engine light came back again today ofcourse

 

Best of luck!

Keep us updated.

 

Have you reset the ecu by pulling the relay or disconnecting the battery after installing new sensors?
Maybe you're picking up old codes.

 

Any chance we can get an update on this? My truck is throwing a p0340!