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4.6 mustang GT 2000 P0340 code

  • Thread starter Thread starter sharpright
  • Start date Start date Feb 10, 2021
S

sharpright

Member
Oct 28, 2020
9
1
13
Mars
Feb 10, 2021
#1
  • Feb 10, 2021
  • #1
My car is throwing a P0340 camshaft position sensor A circuit bank 1 or single sensor code.
The forums say it is most likely the alternator but when engine is running the voltage across the battery reads 14.3V. With headlights (low beam), wipers full speed, heater fan on max, rear defroster, no radio the voltage drops to 14.0 V.
The resistance reading from alternator positive to alternator body or mounting screw (ground) reads ‘0L’ meaning the diode is good. Alternator looks ok.

Is it likely that my sensor is probably bad? Or is there anything else I can check?
The car occasionally does give a slight jerk in fifth gear at high speed/high load when pressing the accelerator hard. The error code always comes at highway speeds and hot engine.

Freeze frame read
Fuelsys1 = CL
fuelsys2 = NA
load % = 8.6
Engine temp = 178
Short fuel trim 1 % = 11.7
Short fuel trim 2 % = 7.0
Long fuel trim 1 % = 5.5
Long fuel trim 2 % = 6.3
RPM = 2443

Thanks
 

McFly2

Member
Nov 21, 2020
68
11
18
Cincinnati
Feb 19, 2021
#2
  • Feb 19, 2021
  • #2
View: https://www.youtube.com/watch?v=LFKL990i0bE


Apparently you can have good voltage; but because of a bad diode in the alternator / you can get frequency pulses (noise) that create havoc in your camshaft position sensor circuit. That can be verified with $100 diagnostic test, or take the money and take your chances on a new alternator.

Ford Mustang P0340 Code: Diagnosis, Causes, How to Fix

One of the more common engine management trouble codes that can occur in the Ford Mustang is P0340. It’s a generic code, which means it has the same definition for every car or truck made aft…
www.700r4transmissionhq.com

Let us know what happens.
 
S

sharpright

Member
Oct 28, 2020
9
1
13
Mars
Feb 27, 2021
#3
  • Feb 27, 2021
  • #3
McFly2 said:
View: https://www.youtube.com/watch?v=LFKL990i0bE


Apparently you can have good voltage; but because of a bad diode in the alternator / you can get frequency pulses (noise) that create havoc in your camshaft position sensor circuit. That can be verified with $100 diagnostic test, or take the money and take your chances on a new alternator.

Ford Mustang P0340 Code: Diagnosis, Causes, How to Fix

One of the more common engine management trouble codes that can occur in the Ford Mustang is P0340. It’s a generic code, which means it has the same definition for every car or truck made aft…
www.700r4transmissionhq.com

Let us know what happens.
Click to expand...
Looks like it might have been just the camshaft sensor. Replaced it and no problems so far. Will post back if the problem happens again.
 
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