Aston Martin diagnostic trouble code
P1001: KOER Not Able to Complete, KOER Aborted
Use this reference to understand the recorded condition, confirm the available V8 Vantage or DB9 manual coverage, and follow the documented diagnostic checks before replacing parts.
- Code family
- Powertrain
- Vehicle system
- Other vehicle system
- Manual coverage
- V8 Vantage, DB9
- Warning-lamp status
- V8 Vantage: Not stated; DB9: MIL
What Aston Martin code P1001 means
KOER Not Able to Complete, KOER Aborted
DB9 preliminary diagnostic manual · section 2-209
Manufacturer fault-analysis procedure
Manual fault definition
P1001 - Key On Engine Running (KOER) self test
not able to complete.
not able to complete.
Cautions and notes
NOTE: The only way a DTC P1001 can be removed
from memory is when all the OBDII monitors have successfully completed during normal vehicle operation.
from memory is when all the OBDII monitors have successfully completed during normal vehicle operation.
Test sequence and decision path
1. Check that BVREF is in range:
Key off. Disconnect the throttle body connector.
Key on.
Measure BVREF at the throttle body harness connector C1589-7 reference chassis ground.
If BVREF is in the range 4.5 - 5.5 volts, go to step
2. If BVREF is outside the range 4.5 - 5.5 volts,
check if P0562 or P0563 is logged. Service the +5
volt supply as necessary. Run a KOER test toensure that the problem is resolved.
2. Can continuous memory DTCs be accessed?
If continuous memory DTCs can be accessed, go
to step 3.
If continuous memory DTCs cannot be accessed,
go to step 6.
3. Can a KOEO self test be activated?
If a KOEO self test can be activated, go to step 4.
If a KOEO self test cannot be activated, go to step
5.
4. Can a KOER self test be activated?
If a KOER self test can be activated, the logged
DTC is not listed for this vehicle. Check that the
correct PCM is installed. Also check for any service bulletins indicating a PCM change. Service as
necessary.
If a KOER self test cannot be activated, go to step
5.
5. Record all logged DTCs. If failures are present in
any of the following systems, this could cause the
P1001 code:
• Fuel control system
•V ehicle speed sensor circuits
•M ass air flow system
If no relevant DTCs are present, go to step 6.
If any DTCs relevant to the above systems are
present, resolve all relevant problems using the
fault analysis procedures in this manual. Run the
KOER Test to ensure that the problem is resolved.
6. Check the 12 volt supply line at the diagnostic
socket:
Check for B+ 12 volt supply on the diagnostic
connector pin 16 measured to the battery negative terminal.
Check the 12 volt return line at the diagnostic
socket:
Repeat the B+ 12 volt check from the diagnostic
connector pin 16 measured to diagnostic connector pins 4 and 5 (Ground).
If the 12 volt supply and return lines are good, go
to step 7.
If either the 12 volt supply or the 12 volt return
lines are faulty, service as necessary. Run the
KOER Test to ensure that the problem is resolved.
7. Check the communications line from the diagnostic socket to the PCM:
Check continuity from OBD II Powertrain socket
pin 6 to pin 14. If any continuity problem is identified, service the CAN bus as necessary and
retest to ensure that the problem is resolved.
If no continuity problem is identified, replace the
PCM and run the KOER test to ensure that the
problem is resolved.
Open the corresponding manual page for wiring diagrams and figures
Key off. Disconnect the throttle body connector.
Key on.
Measure BVREF at the throttle body harness connector C1589-7 reference chassis ground.
If BVREF is in the range 4.5 - 5.5 volts, go to step
2. If BVREF is outside the range 4.5 - 5.5 volts,
check if P0562 or P0563 is logged. Service the +5
volt supply as necessary. Run a KOER test toensure that the problem is resolved.
2. Can continuous memory DTCs be accessed?
If continuous memory DTCs can be accessed, go
to step 3.
If continuous memory DTCs cannot be accessed,
go to step 6.
3. Can a KOEO self test be activated?
If a KOEO self test can be activated, go to step 4.
If a KOEO self test cannot be activated, go to step
5.
4. Can a KOER self test be activated?
If a KOER self test can be activated, the logged
DTC is not listed for this vehicle. Check that the
correct PCM is installed. Also check for any service bulletins indicating a PCM change. Service as
necessary.
If a KOER self test cannot be activated, go to step
5.
5. Record all logged DTCs. If failures are present in
any of the following systems, this could cause the
P1001 code:
• Fuel control system
•V ehicle speed sensor circuits
•M ass air flow system
If no relevant DTCs are present, go to step 6.
If any DTCs relevant to the above systems are
present, resolve all relevant problems using the
fault analysis procedures in this manual. Run the
KOER Test to ensure that the problem is resolved.
6. Check the 12 volt supply line at the diagnostic
socket:
Check for B+ 12 volt supply on the diagnostic
connector pin 16 measured to the battery negative terminal.
Check the 12 volt return line at the diagnostic
socket:
Repeat the B+ 12 volt check from the diagnostic
connector pin 16 measured to diagnostic connector pins 4 and 5 (Ground).
If the 12 volt supply and return lines are good, go
to step 7.
If either the 12 volt supply or the 12 volt return
lines are faulty, service as necessary. Run the
KOER Test to ensure that the problem is resolved.
7. Check the communications line from the diagnostic socket to the PCM:
Check continuity from OBD II Powertrain socket
pin 6 to pin 14. If any continuity problem is identified, service the CAN bus as necessary and
retest to ensure that the problem is resolved.
If no continuity problem is identified, replace the
PCM and run the KOER test to ensure that the
problem is resolved.