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unclefish
Senior Member

81 Posts

Posted - 03/11/2019 :  1:25:20 PM  Show Profile  Reply with Quote
Fault Code: 555
Crankcase Pressure - Data Valid But Above Normal Operating Range - Moderately Severe Level
-CHANGED FILTER,SENSOR, CHECKED WIRING 5V SUPPLY RETURN SIGNAL,CHECKED OIL TUBE. I can clear code go take bus on road and it will come on in the exact same spot getting on highway on full power, bus runs 100%. No other codes, Only other 3 things Could be a Turbo, air compressor since its in the the lower block and fed by oil,blow by the rings only has 70k on the engine any other hints?

unclefish
Senior Member

81 Posts

Posted - 03/11/2019 :  1:28:29 PM  Show Profile  Reply with Quote
should have mentioned 6.7 cummins at. air brake flat nose all American frt engine
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Brad Barker
Administrator

USA
869 Posts

Posted - 03/11/2019 :  8:16:56 PM  Show Profile  Visit Brad Barker's Homepage  Click to see Brad Barker's MSN Messenger address  Reply with Quote
Do you have access to Cummins quickserve? Go to fault code trouble shooting.

Brad A. Barker
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Bluenozer
Advanced Member

Canada
238 Posts

Posted - 03/12/2019 :  02:35:50 AM  Show Profile  Reply with Quote
is least severe code 556 is most severe , check your tubes on driver side , make sure the check valve is ok( located at "y" in the tube system)
it shares its ground and 5volt with 3 other sensors wonder if you data log a trip if any of those other sensors are messing up(cam shaft, compressor ambient air/air temp, intake manifold pressure/temp. are the other sensors)
from your story you demanding big boost at getting on highway , I would assume, could be the intake manifold sensor dropping the ball at certain boost

OEM trained in wiring and all engine platforms for 20 years
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eshover
Senior Member

146 Posts

Posted - 03/12/2019 :  09:09:53 AM  Show Profile  Visit eshover's Homepage  Reply with Quote
We have a 2015 6,7 cummins that had a bad ring/cylinder. They had to overhaul in warranty. The breather filter was full of engine oil and it sounds like the same situation.
ED
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aaronwilmoth80911
Top Member

519 Posts

Posted - 03/12/2019 :  10:13:29 AM  Show Profile  Visit aaronwilmoth80911's Homepage  Reply with Quote
I was thinking the same thing as Ed. I have been told that some Blue Birds and C2s had an issue with the intake tube not sealing correctly and the engine would get dusted.
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RonF
Top Member

793 Posts

Posted - 03/12/2019 :  10:21:27 AM  Show Profile  Reply with Quote
quote:
Originally posted by aaronwilmoth80911

I was thinking the same thing as Ed. I have been told that some Blue Birds and C2s had an issue with the intake tube not sealing correctly and the engine would get dusted.



That's a fact Jack. We check the torque on the clamps during each inspection and most times find the ones coming out of the CAC are loose.

US Army retired CMBT
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unclefish
Senior Member

81 Posts

Posted - 03/13/2019 :  03:52:37 AM  Show Profile  Reply with Quote
I told him to pull the oil cap off and put a oil pad on top of engine. And run it up on highway. Code doesn't come on. had him retake off the y tube with 1 way valves in them. tried cleaning it out with wd40 and air still didn't seem like air was going through. Installed new y tube and code went out.
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eddo
Advanced Member

USA
265 Posts

Posted - 03/13/2019 :  11:18:16 AM  Show Profile  Reply with Quote
We found some 6.7L in IH's (2016, 2017's )where the air tube after the air filter was rubbing on the turbo and rubbing holes in the tube. We did find some holes in the tubes.
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baptistbusman1
Senior Member

USA
170 Posts

Posted - 04/05/2019 :  5:59:43 PM  Show Profile  Reply with Quote
We have this issue going on with a 2013 C2. Replaced the crank filter, tubes and pressure sensor. Light still comes on.

The crank filter still looks brand new even with 2,000 miles on it, so no oil is being forced into it. Would this rule out actually having too much crank pressure? We can drive it 200 miles and it won't come on, but when it does, the bus can be restarted and all will be ok.
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twister
New Member

7 Posts

Posted - 04/12/2019 :  08:36:25 AM  Show Profile  Reply with Quote
Troubleshooting Summary
Lubricating oil dipstick calibration is incorrect
Lubricating oil dipstick calibration is incorrect
Lubricating oil level is incorrect
Crankcase pressure sensor stuck in-range
Crankcase Blowby Check
Turbocharger leaking air into crankcase
Air compressor leaking air into crankcase
Plugged external crankcase breather tube
Worn or damaged power cylinder components
ECM calibration revision history check
Worn or damaged power cylinder components
1 - Lubricating oil dipstick calibration is incorrect
Solution: S00000624

Verification
Conditions
Turn keyswitch OFF.
Action
Check that the lubricating oil level is correct.
Specification
If the oil level is normal, then proceed to the next solution.
If the oil level is high, then proceed to the Linked Solutions section.
Linked Solutions
Click on the link below:

Lubricating oil dipstick calibration is incorrect
Repair
No additional action is required for this solution.
Validation
None
Next Solution
1.1 - Lubricating oil dipstick calibration is incorrect
Solution: S00000625

Verification
Conditions
Turn keyswitch OFF.
Action
Check the lubricating oil dipstick calibration and oil pan capacity. Refer to Procedure 007-009
Specification
If the lubricating oil dipstick and oil pan capacity are not within specification, then proceed to the Repair section.
Linked Solutions
None
Repair
Calibrate the lubricating oil dipstick for the proper oil level. Refer to Procedure 007-009
Validation
Connect all components
Connect the recommended Cummins electronic service tool or equivalent.
Disable Fault Code
Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.
Verify that the fault code is no longer active.
Check ECM Calibration Revision History
Use the recommended Cummins electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
Refer to ECM Calibration Revision History Database.
Parent Solution
2 - Lubricating oil level is incorrect
Solution: S00003234

Verification
Conditions
Turn keyswitch OFF.
Action
Make sure the vehicle is on a level surface with the engine off.
Check that the lubricating oil level is correct.
Visually inspect engine for external lubricating oil leaks.
Determine if the lubrication oil is contaminated with coolant or fuel.
Specification
If the oil level is high and coolant contamination has been detected, then reset the search to Coolant in the oil.
If the oil level is high and fuel contamination has been detected, then reset the search to Fuel in the oil.
If the oil level is high and no coolant or fuel contamination has been detected, then incorrect oil dipstick calibration has been detected.
If the oil level is low, then proceed to the Repair section.
If the oil level is normal, then proceed to the next solution.
Linked Solutions
None
Repair
Repair or replace only the components that were found to be out of specification.

Search for coolant in oil.
Search for fuel in oil.
Calibrate the lubricating oil dipstick for the proper oil level. Refer to Procedure 007-009
Repair or replace the source of the external lubricating oil leak.
Validation
Connect all components
Connect the recommended Cummins electronic service tool or equivalent.
Disable Fault Code
Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.
Verify that the fault code is no longer active.
Check ECM Calibration Revision History
Use the recommended Cummins electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
Refer to ECM Calibration Revision History Database.
Next Solution
3 - Crankcase pressure sensor stuck in-range
Solution: S00000623

Verification
Conditions
Turn keyswitch ON.
Connect the recommended Cummins electronic service tool or equivalent.
Action
Use the recommended Cummins electronic service tool or equivalent.
Monitor the crankcase pressure sensor.
Specification
A malfunctioning crankcase pressure sensor has been detected if the crankcase pressure sensor is not within the following specification: 0 ± 0.28 kPa - G [0 ± 1.2 in H2O]
Linked Solutions
None
Repair
Replace crankcase pressure sensor. Refer to Procedure 019-445
Validation
Connect all components
Connect the recommended Cummins electronic service tool or equivalent.
Disable Fault Code
Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.
Verify that the fault code is no longer active.
Check ECM Calibration Revision History
Use the recommended Cummins electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
Refer to ECM Calibration Revision History Database.
Next Solution
4 - Crankcase Blowby Check
Solution: S00005142

Verification
Conditions
Turn keyswitch ON.
Engine running.
Action
Check the crankcase breather element type.
If the element is not a maintenance free insert, then check the maintenance interval to determine if the maintenance interval has been exceeded.
Perform the crankcase blowby measurement test. Refer to Procedure 014-010
Specification
If the crankcase breather element exceeds the maintenance interval, then proceed to the Repair section.
If the blowby measurement is not within specification with the element bypassed, then proceed to the Linked Solutions section.
Linked Solutions
Turbocharger leaking air into crankcase
Air compressor leaking air into crankcase
Plugged external crankcase breather tube
Worn or damaged power cylinder components
Repair
No additional action is required for this solution.
Validation
None
Next Solution
4.1 - Turbocharger leaking air into crankcase
Solution: S00001203

Verification
Conditions
Turn keyswitch OFF.
Action
Perform the crankcase blowby measurement test with the turbocharger isolated. Refer to Procedure 014-010
Specification
If the turbocharger blowby contribution is out of specification, then a malfunctioning turbocharger has been detected.
Linked Solutions
None
Repair
Replace the turbocharger. Refer to Procedure 010-033
Validation
Connect all components
Connect the recommended Cummins electronic service tool or equivalent.
Disable Fault Code
Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.
Verify that the fault code is no longer active.
Check ECM Calibration Revision History
Use the recommended Cummins electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
Refer to ECM Calibration Revision History Database.
Parent Solution
4.2 - Air compressor leaking air into crankcase
Solution: S00001204

Verification
Conditions
Turn keyswitch OFF.
Action
Perform the crankcase blowby measurement test with the air compressor isolated. Refer to Procedure 014-010
Specification
If the air compressor blowby contribution is out of specification, then a malfunctioning air compressor has been detected.
Linked Solutions
None
Repair
Replace the air compressor. Refer to Procedure 012-014
Validation
Connect all components
Connect the recommended Cummins electronic service tool or equivalent.
Disable Fault Code
Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.
Verify that the fault code is no longer active.
Check ECM Calibration Revision History
Use the recommended Cummins electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
Refer to ECM Calibration Revision History Database.
Parent Solution
4.3 - Plugged external crankcase breather tube
Solution: S00001375

Verification
Conditions
Turn keyswitch OFF.
Action
Visually inspect the oil drain tubes, check valves, breather tubes, and oil separator for plugging. Refer to Procedure 003-018
It is important to check for a frozen, plugged, or restricted crankcase breather tubes in extreme cold ambient temperatures. Ice can form in the crankcase breather tubes causing obstruction/sticking and may not be present at the time of troubleshooting.

Specification
If the crankcase breather element is incorrectly installed or the crankcase breather inlet hose is restricted or damaged, then a malfunction of the crankcase breather element or restricted crankcase breather inlet hose has been detected.
Linked Solutions
None
Repair
Clean or replace the crankcase ventilation oil drain tubes, check valves, breather tube, or separator. Refer to Procedure 003-018
Validation
Connect all components
Connect the recommended Cummins electronic service tool or equivalent.
Disable Fault Code
Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.
Verify that the fault code is no longer active.
Check ECM Calibration Revision History
Use the recommended Cummins electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
Refer to ECM Calibration Revision History Database.
Parent Solution
4.4 - Worn or damaged power cylinder components
Solution: S00002974

Verification
Conditions
Turn keyswitch OFF.
Action
Visually inspect the pistons. Refer to Procedure 001-043
Visually inspect the piston rings. Refer to Procedure 001-047
Visually inspect the cylinder block bore. Refer to Procedure 001-026
Specification
If damaged or worn power cylinder components are found, then proceed to the Repair section.
Linked Solutions
None
Repair
Repair or replace only the components that were found to be out of specification.

Replace the piston. Refer to Procedure 001-043
Replace the piston ring. Refer to Procedure 011-047
Repair or replace the cylinder block. Refer to Procedure 001-026
Validation
None
Parent Solution
5 - ECM calibration revision history check
Solution: S00000443

Verification
Conditions
Connect all components.
Turn keyswitch ON.
Connect the recommended Cummins electronic service tool or equivalent.
Action
Use the recommended Cummins electronic service tool or equivalent to read the fault codes.
Use the recommended Cummins electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revision listed in the ECM calibration revision history for applicable changes.
Specification
If a calibration update for this fault code is available, the ECM calibration revision must be that revision or higher.
Linked Solutions
None
Repair
Prior to downloading the ECM calibration, check to see that all job images and all other troubleshooting has been documented as downloading an ECM calibration will remove the fault codes on the ECM.
Download the updated ECM calibration code. Refer to Procedure 019-032
Validation
Connect all components
Connect the recommended Cummins electronic service tool or equivalent.
Disable Fault Code
Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.
Verify that the fault code is no longer active.
Check ECM Calibration Revision History
Use the recommended Cummins electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
Refer to ECM Calibration Revision History Database.
Next Solution
6 - Worn or damaged power cylinder components
Solution: S00001715

Verification
Conditions
Turn keyswitch OFF.
Action
Remove the cylinder head. Refer to Procedure 002-004
Visually inspect the pistons. Refer to Procedure 001-043
Visually inspect the piston rings. Refer to Procedure 001-047
Visually inspect the cylinder block bore. Refer to Procedure 001-026
Specification
If damaged or worn power cylinder components are found, then proceed to the Repair section.
Linked Solutions
None
Repair
Repair or replace only the components that were found to be out of specification.

Replace the worn or damaged power cylinder components.
Replace the piston. Refer to Procedure 001-043
Replace the piston ring. Refer to Procedure 001-047
Repair or replace the cylinder block. Refer to Procedure 001-026
Validation
Connect all components
Connect the recommended Cummins electronic service tool or equivalent.
Disable Fault Code
Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.
Verify that the fault code is no longer active.
Check ECM Calibration Revision History
Use the recommended Cummins electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
Refer to ECM Calibration Revision History Database.
If all steps have been completed and no root cause has been identified, then follow the technical escalation process.

Table Of Contents

Last Modified: 21-Mar-2019
I had has the issues twice, ended up being the turbo on both occasions.
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baptistbusman1
Senior Member

USA
170 Posts

Posted - 04/18/2019 :  05:47:12 AM  Show Profile  Reply with Quote
I miss the days when all of this stupid computer EPA junk wasn't here. Spending all day on one bus kills our shop. Today ran bus with insite running trying to get it to throw the code. We monitored the Crankcase Pressure sensor and it's voltage. Drove 50 miles, and the graphing ran normal, almost in a straight line, except for one second they both spiked up to around 30 and back to normal. That turned on the stop engine light and de-rated the bus...stupid. On the way back, they both ran the normal specs...
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baptistbusman1
Senior Member

USA
170 Posts

Posted - 05/03/2019 :  10:44:20 AM  Show Profile  Reply with Quote
Did the ecm calibration and has same results.

Get this, put on another pressure sensor and just sat it on the valve cover and ran it with it plugged in. Still throws the 555 code. So now what? ECM?
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unclefish
Senior Member

81 Posts

Posted - 05/03/2019 :  6:11:10 PM  Show Profile  Reply with Quote
Air brake bus. I have heard of air compressor leaking back into crank case. Then your next thing you need to worry about is blow by ...motor going south..did you happen to follow the wiring diagram and make sure that they don't tie that in with any other sensors. I had a low coolant sensor short out that was tied in with accelerator pedal and it made the bus stuck in half throttle. Sent it in to Blue bird and still haven't heard a word back.
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baptistbusman1
Senior Member

USA
170 Posts

Posted - 09/14/2019 :  4:14:42 PM  Show Profile  Reply with Quote
Ok, we are still dealing with this bus. Turbo had play so we replaced it. When we had it off we pulled the egr cooler and it had been leaking and was plugged up, thought we had it solved. Took it out and ran it to death with no codes. Decided to take it out one more time, light back on. Code 555. Watched on Insite, the voltage for crank pressure spikes for a second, throws the light then goes back to normal. Clear the code, restart and drove it 50 miles with no light. Park it and drive 2 miles voltage spikes a second and light back on 555.

For those who mentioned they had to have major engine work, are these similar symptoms? Wouldn’t the pressure be high all the time and get oil in the crank filter?
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Bluenozer
Advanced Member

Canada
238 Posts

Posted - 09/18/2019 :  08:29:59 AM  Show Profile  Reply with Quote
[/quote] For those who mentioned they had to have major engine work, are these similar symptoms? Wouldn’t the pressure be high all the time and get oil in the crank filter?
[/quote]
with the voltage jumping around like that I would LOAD test wires from ecm to sensor and if you got a sister bus try swapping ecms

usually the 555 code would on all the time with blow by

OEM trained in wiring and all engine platforms for 20 years
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dsalinas1939
Top Member

USA
946 Posts

Posted - 09/19/2019 :  04:22:12 AM  Show Profile  Reply with Quote
i had a simular issue last year i had a turbo sieze i replaced the turbo and crankcase filter sent bus out and two days later the check engine light came on for code 555 i cant remember the exact steps i took but i now someone one here recomended checking the drain tube that y tube on driverside of engine i replaced that and the bus never had a problem again part number 5255740
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