Paccar MX 13 Fault Codes

I would greatly appreciate a list of the paccar codes if you dont mind.
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insanityeight@gmail.com

 

Could you please send me the Paccar list also? Kgtrans10204@gmail.com

 

Links to the codes are on the last page of this thread, just download them, no need to ask.

 

If you still have these sheets and willing to share, could you email to bestwayteamtransport@gmail.com
We just bought a 2014 T680 and it has code 38, 40 99 100 but all at different times after a "low quality DEF"

 

This code is quite comprehensive and covers allot of ground, usually associated with other codes more specific, is there something else- dash info center/MCS switch?

 

I'm trying to diagnose a P1278 on an EPA10 MX. When I go to unzip the file it asks for a password.
What is the password to the file?

 

P1278
Fault code description
Cylinder 6 - Torque contribution too high
Possible cause
Symptom: Engine block vibration

1. Leaking injector
2. Valve train damage
3. Large unbalance on the driveshaft
4. Flywheel damaged
5. Fuel supply issues (dirt, air in system)

Additional information
-
Set condition of fault code
This diagnostic starts 30 seconds after the engine starts and it runs continuously.
The PMCI-2 ECU detects the unbalance after nine seconds at 650 rpm until three seconds at 2000 rpm.
Reset condition of fault code
This fault code will change to inactive immediately after the diagnostic runs and passes.
Step 1A: Fuel system related codes
Troubleshooting steps

1. Use DAVIE to check for any fuel-related system codes.

Are there any fuel related faults active?

• Yes – Proceed with troubleshooting fuel-related faults.
• No – Proceed to step 2A.

Step by step 2: Visual Inspections
Step 2A: Check fuel injector connectors and PMCI-2 connections
Troubleshooting steps

1. Visually inspect the associated component connections and wiring for any of the following:
   • Damaged or loose connectors
   • Bent, broken, corroded or loose connector pins
   • Moisture or dirt in the connections
   • Damage to the wire harness or insulation
   • The correct parts are not installed
   • ECU connections are damaged or disconnected

Was there evidence of any of the above?

• Yes – Repair any issues found.
• No – Proceed to step 2B.

Step 2B: Fuel system components
Troubleshooting steps

1. Visually inspect the associated fuel system component connections for any of the following:
   • Signs of fuel leaks occurring in any related joints, lines, and pumps
   • Clogged filter
   • Bent or broken fuel lines or fittings
   • Fuel component parts not installed correctly

Was there evidence of any of the above?

• Yes – Correct or repair any issues found. Refer to set fault condition to perform the corresponding repair verification cycles to confirm that the related fault condition has been corrected. Use DAVIE to retest active faults.
• No – Proceed to step 3A

Step 2C: Check flywheel
Troubleshooting steps

1. Check for damage to the flywheel.

Is there damage to the flywheel?

• Yes – Proceed to step 6A.
• No – Proceed to step 3A.

Step by step 3: Sensors
Step 3A: Check the crankshaft and camshaft sensor
Troubleshooting steps

1. Switch off the ignition.
2. Disconnect the crank speed sensor.
3. Measure the resistance between the signal and ground pins of the crank speed sensor.
4. Perform a continuity test on all the wires associated with the crank speed sensor.
5. Inspect the crank speed sensor for damage or debris.
6. Reconnect the crank speed sensor.
7. Perform the same tests on the camshaft sensor.
8. Reconnect the camshaft sensor.

Did both sensors pass these tests?

• Yes – Proceed to step 4A.
• No – If the resistance on either sensor is incorrect or it has physical damage, replace that sensor. Use DAVIE to verify the repair.
  If the continuity of the wires to the sensors is incorrect, find and solve the source of the problem.

Step by step 4: Valve clearances
Step 4A: Check valve clearances
Troubleshooting steps

1. Check the valve clearances to the specifications.

Are the valve clearances to specification?

• Yes – Proceed to step 5.
• No – Set the valve clearances to the correct specification. If the fault still exists, proceed to Step 5.

Step by step 5: Engine brake
Step 5A: Check the engine brake
Troubleshooting steps

1. Test Drive the Truck with engine brakes ON 100%.
2. Drive the truck using the engine brakes in all RPM ranges after 1000 rpm.

Are the engine brakes functioning is all operational areas?

• Yes – Proceed to step 6A.
• No – Replace the engine brake Unit associated with the misfiring cylinder. If the fault still exists, proceed to Step 6A.

Step by step 6: Contact PACCAR Engine Support Center

 

Thank You

 

More often than not, I have found that there is nothing wrong with the cylinder throwing a contribution too high fault unless it is the only cylinder affected. Often these faults are shadowed from sister or companion cylinders in the firing order that are not contributing or are too low. Always address low contributing cylinders first. Ussually the offender.......problem cylinder will have the highest fault count.

 

My 2013 paccar mx-13 has been throwing false fault codes while on the road and running like crap. I tell my boss and he says it's always thrown codes.I decided to take pics of the screen(wife's idea) and thank God I listened. By the time I got back to the yard all the faults were gone. The boss takes it for a test drive and says it running fine. I look like an idiot. I have over 25yrs driving, I know what I know when I say it's running like ####. Then next week I leave out and it's time for my mid service. I stop at the Boss Shop and pull into the bay and turn the key to the off position but the truck keeps running. Now that has never happened to me before. Again, I got it video and the techs also saw it and were perplexed. Do I have a possessed truck, twilight zone gremlins or is there a serious problem that everyone is just ignoring?