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Codes P1340 and PO463

Tiny
FREDERICK EISELT
  • MEMBER
  • 2001 ISUZU RODEO
  • 3.2L
  • V6
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
I bought a the vehicle listed above it is the Sport. It is in good shape until I realized everyone has problems with this SUV. Code P1340 dose not show up in the book.
Monday, June 26th, 2017 AT 7:21 PM

8 Replies

Tiny
HARRY P
  • MECHANIC
  • 2,293 POSTS
DTC P1340 ION Sensing Module Cylinder ID Fault (Cylinder Synchronization Fail)

Circuit Description
The Power Control Module (PCM) checks the validity of the signals used in the ION Sensing module at the following engine operating conditions. This test will return a fault if the cylinder synchronization routine has not been completed after a predetermined number of events after crank. This test will detect fault that will prevent the PCM from synchronization, such as Knock Signal (KI) - Combustion Quality (CQ) lines being swapped, shorted spark plugs, ION Sensing module faults, an PCM hardware faults.

Conditions for Setting the DTC
Ignition voltage is between 11 volt and 16 volts.
Engine speed is between 650 rpm and 6250 rpm.
No ECT DTCs set.
No injector DTCs set.
No Fuel Trim DTCs set.
No Misfire DTCs set.
No system voltage DTCs set.
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Monday, June 26th, 2017 AT 8:16 PM
Tiny
FREDERICK EISELT
  • MEMBER
  • 4 POSTS
I have two cylinders with damaged spark plug boots. There is no plug wires could the boot be responsible for the P1340 code?
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Tuesday, June 27th, 2017 AT 6:08 AM
Tiny
THEMAILMAN
  • MEMBER
  • 85 POSTS
It does say that shorted spark plugs can cause this code, so I would go ahead and fix that, clear the codes, and see if it comes back.
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Tuesday, June 27th, 2017 AT 8:14 AM
Tiny
HARRY P
  • MECHANIC
  • 2,293 POSTS
I would definitely change the plugs and wires. Then clear out the codes and see if it comes back. If it does, then do what you can of the diagnostics that I posted earlier.
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Tuesday, June 27th, 2017 AT 9:10 AM
Tiny
FREDERICK EISELT
  • MEMBER
  • 4 POSTS
This is a picture of the plugs that came out. No electrode left ! I cannot believe this engine started and ran. I bought this as a project, the SUV sat in a driveway for eight years. I am getting ready to change the timing belt, tension-er and water pump, I bet this is an engine that if the valve timing jumped I would have nothing left with 4 camshaft?
I been through that before and you are better off finding another engine.
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Tuesday, June 27th, 2017 AT 11:48 AM
Tiny
HARRY P
  • MECHANIC
  • 2,293 POSTS
Yeah those plugs definitely need changing. The gaps are all messed up and I bet Autolites are not even stock on that vehicle. I would think it should have NGK's but cannot look it up right now.
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Tuesday, June 27th, 2017 AT 12:57 PM
Tiny
FREDERICK EISELT
  • MEMBER
  • 4 POSTS
I just put a set of NGK BKR5ES-11 2382 Sparkplugs. Also I replaced the damaged boots. The old guy really sounds good. Tomorrow it's the timeing belt, tensioner and water pump. Also all the codes cleared. I think everything is good to go now. Thanks for all your help.
I know there is no money to be made on this one but I like it and it will make a good driver.
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Tuesday, June 27th, 2017 AT 3:54 PM
Tiny
HARRY P
  • MECHANIC
  • 2,293 POSTS
Glad to help. Let us know if you need anything else
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Tuesday, June 27th, 2017 AT 4:34 PM

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