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Jerry, Master Mechanic
Category: Car
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Experience:  ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
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Have another question about 96 land rover discovery

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Have another question about 96 land rover discovery
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Customer: replied 4 years ago.
I like dealing with you. Talked to about a week ago about Land rover discovery 96. Told you it acted like it was going to die over 50mph. I changed fuel filter and ended up with a lot of leaks. Finally got it all replaced. Still didnt fix problem and service engine light came on. Codes are P1138, P0430, P0420, and P0340. Help!!
I could see the camshaft position sensor giving a problem like that, not so much the cat efficiency codes or the 02 sensor heater code.

DTC P0430
Catalyst efficiency is low, bank B (Driving Cycle C)

Possible causes by suggested order of priority:
  • Catalyst failure.

Catalyst failure.

  • Catalyst failure indicated.



DTC P0340
Camshaft sensor circuit fault or signal timing different from crankshaft sensor signal (Driving Cycle A)

Possible causes by suggested order of priority:

  • Connectors C1017, C1021, C1029.
  • Circuit integrity C1017/36 (RB) - C1021/1 (B).
  • Circuit integrity C1017/2 (SU) - C1021/2 (SU).
  • Circuit integrity C1029/3 (NO) - C1021/3 (NO).
  • Supply from C1029/3.
  • Camshaft position sensor.
  • ECM.

DTC P1138
Oxygen sensor problem with switching lean, sensor(s) for bank A (Driving Cycle C)






Definately make sure that the crankshaft position sensor is not loose. Some had problems with that.



















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Customer: replied 4 years ago.
Thanks for the advice. Will take a couple days for me to get those checked out.Would like to get back strictly with you. Iam going to accept answer but will request you again.

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