Will not start after replacing the crankshaft position sensor

MIKEH12

MEMBER
2007 TOYOTA TUNDRA
5.7L
V8
4WD
AUTOMATIC
136,000 MILES

I replaced the crankshaft position sensor because I got a code saying it was bad and had trouble starting a few times but after I replaced the sensor it will not start at all. I did disconnect the negative battery terminal before I replace the sensor. Would that have caused a problem?

5 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

What was the code that was set? It is rare that a code identifies a bad part, it identifies a failed system.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

When you crank the engine, does the tachometer move up a little and show RPM? That will tell me if the sensor is sending a signal to the ECM.

Roy

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Sunday, June 14th, 2020 AT 1:39 PM

MIKEH12

MEMBER
3 POSTS

P0335 was the code. I took out the new sensor and put back in the old one and now it will crank, but is still giving the same code.

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Sunday, June 14th, 2020 AT 2:23 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

Okay, if it runs with the old sensor, then you have a bad new sensor.

I would get an OEM sensor as it may not be up to quality at all. Very common.

I attached possibilities for you.

Roy

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