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Doctor D
Doctor D, Auto Service Technician
Category: Ford
Satisfied Customers: 763
Experience:  ASE Master, 20 Years Experience,
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I get code P0603 on my Ford. What is this and how to fix it?

Customer Question

Got a code of P0602. What is this code? And what can I do to correct it?

Submitted: 9 years ago.
Category: Ford
Expert:  Doctor D replied 9 years ago.


Thank you for asking your question on Just Answer. The other experts and I are working on your answer. By the way, it would help us to know:
-What year is your Ford?
-What model is your Ford?
-How many miles are on your Ford?
-What type of engine is in your Ford?
-What have you already tried?
Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.

Customer: replied 9 years ago.

1997 diesel 4x4 ford with 135,000 miles
7.3 I think.
Had the transmission rebuilt and now the the code light keeps coming on. The mechanic is trying to figure it out, what is going on, and has me disconnected the battery to clear out the codes but then he keeps getting p0603 which he claims is a "cam" senor code but I see it is a code also for disconnected batteries.
So I was wondering about what you thought??

Expert:  Doctor D replied 9 years ago.

I have no reference to a p0602. There is no such code.

Customer: replied 9 years ago.

Oh, I am sorry p0603 and we are getting code p0344

Expert:  Doctor D replied 9 years ago.

That's easy and very, very common. Replace the cam sensor and your problems will be fixed. Its right by the crank pulley.


  1. Disconnect Camshaft Position (CMP) sensor electrical connector.
  2. Remove bolt and CMP sensor.


  1. Install CMP sensor and bolt.
  2. Connect CMP sensor electrical connector.