Will not start after replacing the crankshaft position sensor

2007 TOYOTA TUNDRA

136,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC

MIKEH12

MEMBER
3 POSTS

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?

Jun 14, 2020 at 4:53 AM

ASEMASTER6371

✓Experienced Mechanic
52,796 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

Jun 14, 2020 at 6:39 AM

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.

Jun 14, 2020 at 7:23 AM

ASEMASTER6371

✓Experienced Mechanic
52,796 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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Jun 14, 2020 at 7:34 AM

MIKEH12

MEMBER
3 POSTS

Thanks for the quick response.

Jun 14, 2020 at 7:38 AM

ASEMASTER6371

✓Experienced Mechanic
52,796 POSTS

You are welcome.

always glad to help.

Roy

Jun 14, 2020 at 7:43 AM

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