Aston Martin diagnostic trouble code
P0463: Fuel Level Sensor A Circuit High Input
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
- Fuel and air
- Manual coverage
- V8 Vantage, DB9
- Warning-lamp status
- V8 Vantage: MIL; DB9: MIL
What Aston Martin code P0463 means
Fuel Level Sensor A Circuit High Input
DB9 preliminary diagnostic manual · section 2-116
Manufacturer fault-analysis procedure
Manual fault definition
P0463 - Fuel level sensor circuit high input.
Test sequence and decision path
1. Check the resistance of the fuel level sensor at the
Central Electronic Module. Check between pins
C0587-7 and C0587-5.
The resistance should be in the range 10 Ω tank
full to 204Ω tank empty.
If the resistance is in range and stable, go to step
2. If the resistance is out of range, check continuity
of the sensor wiring between the central electronic module and fuel tank connector pins
C0114-2 and C0114-5 If continuity is good,
replace the fuel level sensor. Clear the P0461
code and run a KOER test to ensure that the problem is resolved.
2. Arrange a break-out lead from connector C0587
pins 7 and 8. Use an analogue meter to monitor
the fuel level signal on the break-out lead during
a road test. Observe the signal for indications of
an intermittent short circuit to +5 or +12 volt supply lines. Include some driving over ‘bumpy’ surfaces and around tight turns.
3. If the signal is stable and in-range, the cause of
the P0463 is not present at this time and testing is
complete.
If the signal is unstable, recheck continuity of the
sensor wiring and service as necessary Clear the
P0461 code and run a road test to ensure that the
problem is resolved.
Open the corresponding manual page for wiring diagrams and figures
Central Electronic Module. Check between pins
C0587-7 and C0587-5.
The resistance should be in the range 10 Ω tank
full to 204Ω tank empty.
If the resistance is in range and stable, go to step
2. If the resistance is out of range, check continuity
of the sensor wiring between the central electronic module and fuel tank connector pins
C0114-2 and C0114-5 If continuity is good,
replace the fuel level sensor. Clear the P0461
code and run a KOER test to ensure that the problem is resolved.
2. Arrange a break-out lead from connector C0587
pins 7 and 8. Use an analogue meter to monitor
the fuel level signal on the break-out lead during
a road test. Observe the signal for indications of
an intermittent short circuit to +5 or +12 volt supply lines. Include some driving over ‘bumpy’ surfaces and around tight turns.
3. If the signal is stable and in-range, the cause of
the P0463 is not present at this time and testing is
complete.
If the signal is unstable, recheck continuity of the
sensor wiring and service as necessary Clear the
P0461 code and run a road test to ensure that the
problem is resolved.