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just a tish NE of central ND | Can anyone tell me what this code means?Check engine flashes twice, then five times. so must mean code 20-05 right? P I T A peec engines......
From what I can tell there were 25,000 made and that was 25,000 too many.......
Edited by School Of Hard Knock 12/31/2011 13:04
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Mount Vernon, WA | I'm guessing it's actually flash code 25, which would be a problem with the boost sensor and/or circuit. This should cause low power since the ECM does not know what the actual boost is, and will limit fueling until it does.
Below are the flash codes for a 3406C engine. (4CK prefix).
System Diagnostic Code
Diagnostic Code Description
01 Idle Shutdown Timer
12 Coolant Level Sensor Fault
21 Sensor Supply Voltage Fault
22 Rack Position Sensor Fault
23 Timing Position Sensor Fault
24 Oil Pressure Sensor Fault
25 Boost Pressure Sensor Fault
27 Coolant Temperature Sensor Fault
28 Check Throttle Sensor Adjustment
31 Loss of Vehicle Speed Signal
32 Throttle Position Sensor Signal Fault
33 Engine RPM Signal Fault
34 Loss of Engine Speed Signal
35 Engine Overspeed Warning
36 Vehicle Speed Signal Fault
41 Vehicle Overspeed Warning
42 Check Sensor Calibration
43 Rack Subsystem Fault
44 Timing Subsystem Fault
45 Shutoff Solenoid Fault
46 Low Oil Pressure Warning
47 Idle Shutdown Occurrence
48 Excessive Engine Power
51 Intermittent Battery Power to ECM
52 ECM or Personality Module Fault
53 ECM Fault
55 No Detected Faults
56 Check Customer Parameters or System Parameters
58 Powertrain Data Link Fault
61 High Coolant Temperature Warning
62 Low Coolant Level Warning
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just a tish NE of central ND | Now that makes perfect sense. It had great power going uphill and then I saw "check engine" light activate and things slowed down from there. Seemed even empty it struggled to pull above 1500 rpm's and it normally had good torque curve all the way up to 1800 rpm's.
Causes? Bad sensor ar wire possibly? It seemed that some times it felt like it momentarily kicked in a and started to pull hard and then relaxed into a lower power mode again. You would hear the turbo spool up and the drop back before it gained many rpm's.Almost like something told the fuel to cut back as soon as it gained a few RPM'S |
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just a tish NE of central ND | Bern,,,,, Do you work on these things? or did you find that info on the internet somewhere? Will this code now be stored and need to be cleared?How do you do that ? or will it go away by itself after correcting the problem or disconecting the battery??
Thanks for the info.
Edited by School Of Hard Knock 12/31/2011 14:12
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Brazilton KS | It should clear after the battery is unhooked, or probably after a number of restarts. I don't think it will derate unless the fault condition actually exists...ie if you fix the problem it should go back to full power even if the check engine stays on for a while before it resets. Bern has all the good manuals where he works, I imagine he looked it up there, but I wouldn't be surprised if the codes could be found online....lol, I guess they definitely can now, on NAT! |
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Mount Vernon, WA | Yes, I did find this info on the net, but it was from Cat SIS (Service Information System). In other words, you need Cat passwords for access.
I have attached a wire diagram for a 3406C engine with a 4CK prefix. Yours may or may NOT be the same. I would need your full engine serial number to be sure, as there was more than one variety of that engine made.
Note on page one of the diagram, it shows a "transducer module" on the back of the injection pump. The boost sensor is located inside this housing. Wiring from the boost sensor then goes out to the ECM (see page 2).
There should be a hose attached to the intake manifold that goes to the transducer module so the pressure sensor can sense boost. If this hose were loose or bad, it would not throw a code (it would simply have low power since the sensor was reading low boost), so I suspect a sensor or wiring issue, most likely the sensor. If it is the sensor, that could be spendy, and I would look into maybe converting it over to a later 3406E remote style sensor.
One final note: I am not CATguy. I have a fair bit of experience with later model Cats (specifically 3406Es, C15s, etc.), but I am no expert. I also have to be a Detroit guy, Cummins freak, International wizard, and even a Mack guru from time to time. In other words, I am a jack of all trades, but a master of none. I'm certainly no Cat PEEC expert, and as I understand, no-one out there really wants to be, for good reason.
Attachments
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 Cat 3406C Wire Diagram.pdf (965KB - 2444 downloads)
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| Been a long time, bost code 25 will couse low power as you get stuff all fuel as it dose not know it has any air to go with the fuel. It is the trasduser in the back of the fuel pump for boost sensor.
I would save up for a fuel pump off a 3406b or a 3406c mechinical non peec. This is the most cost effective fix in the long run. Not a truck expert but if you can find a 3406c mechinical pump the had hire fuel pressure than a 3406b pump from memory. Ether pump would be batter and less wires.
Peecs were so bad there was even a program to change engine other to 3406E's buy Cat don't know what it cost at the time but would off been money well spent buy the customer.
Madsnake |
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just a tish NE of central ND | Madsnake.... Is this 4 CK 3406 c PEEC engine just going to continue to give me one problem after the next as long as I own it?Is that the way these things were?
You say I can change this pump out to a mechanical 3406 B pump and skip all the other troubles??Will that work? How difficult is it to do that? Might be able to find a pump from 3406 B that is scraped.
Edited by School Of Hard Knock 12/31/2011 21:26
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Leeds, North Dakota | http://www.enginesmanual.com/caterpillar/caterpillar-fault-codes-li... hope this helps, happy new year, Scott. |
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code 20-05 on Cat 3406 c peec enigne
