TOYOTA AVALON 2008 Check Engine Light does not display when you turn the ignition

[hilltop car care]

Please I need your suggestion. Am currently working on a Toyota Avalon 2008. It was not starting so I did a diagnosis and got the error code P0335- Crankshaft Position Sensor 'A' Circuit Malfunction and P0102 - Mass or Volume Air Flow Circuit Low Input. I cleaned up the CKP sensor, same issue and I went ahead to replace it,replaced the air filter, I discovered the engine oil was very dirty and due for a change, I had to do that, the fuel filter was cleaned up. After all that the car came up, was fine for some time and went off again. I did another diagnosis and got P0393 - Camshaft Position Sensor 'B' Circuit High Bank 2. All this while the check engine light was still on. We noticed a cut on the cam shaft sensor and tried amending it. The car came up, was on for 15 minutes and went off again. Right now when you turn on the ignition all the dashboard lights comes up exclusive of the check engine light. What could be the likely cause?

[mmotley]

shorted sensor or circuit to ground. There are probably about 5-10 sensors that are checked before starting will happen. If any of them are shorted, the ecm will shut down, no communication will occur, and check engine light will NOT be illuminated when the key is turned on. You will have to unplug each sensor one by one, turn the ignition back on, and see if comes back on. Once it comes back on, the last sensor you unplugged is the culprit. If none of them fix it, you have a circuit shorted.

[ncautoshop]

Please I need your suggestion. Am currently working on a Toyota Avalon 2008. It was not starting so I did a diagnosis and got the error code P0335- Crankshaft Position Sensor 'A' Circuit Malfunction and P0102 - Mass or Volume Air Flow Circuit Low Input. I cleaned up the CKP sensor, same issue and I went ahead to replace it,replaced the air filter, I discovered the engine oil was very dirty and due for a change, I had to do that, the fuel filter was cleaned up. After all that the car came up, was fine for some time and went off again. I did another diagnosis and got P0393 - Camshaft Position Sensor 'B' Circuit High Bank 2. All this while the check engine light was still on. We noticed a cut on the cam shaft sensor and tried amending it. The car came up, was on for 15 minutes and went off again. Right now when you turn on the ignition all the dashboard lights comes up exclusive of the check engine light. What could be the likely cause?

scanner Danner has covered a very similar topic on YouTube that gives some direction to your issue!

 

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[cdhowell]

What did you find?