Aston Martin diagnostic trouble code
P0193: Fuel Rail Pressure Sensor 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 P0193 means
Fuel Rail Pressure Sensor High Input
DB9 preliminary diagnostic manual · section 2-60
Manufacturer fault-analysis procedure
Manual fault definition
P0193 - Fuel rail pressure - more than maximum
volts.
volts.
Cautions and notes
CAUTION: These codes may be generated in the
Primary or Secondary Powertrain Control Module
(PCM) Check that you are working on the correct
half of the engine.
NOTE: Target pressure is increased in hot
conditions
).
Primary or Secondary Powertrain Control Module
(PCM) Check that you are working on the correct
half of the engine.
NOTE: Target pressure is increased in hot
conditions
).
Test sequence and decision path
1. Connect the WDS or scan tool. Confirm that a
code P0193 is logged.
If any of P1233, P1235 or P1237 (fuel pump drive
module faults) are logged, resolve these codes
first and return to this procedure only if a P0193
is logged again after clearing any P1233 - 1237
faults
2. Monitor the fuel pressure signals on both fuel
rails using the datalogger.
The fuel system must be capable of maintaining
39-41 psi above manifold pressure in both fuel
rails (
3. If either fuel pressure reading is significantly out
of specification, substitute a good sensor and
repeat the pressure test.
4. If the pressure readings are still significantly different, key off, disconnect the affected sensor.
Key on. Measure the voltage from sensor harness
connector pins 1 and 2.
If +5 volts is available, go to step 5.
If +5 volts is not available. service the sensor wiring to eliminate poor connections. Clear the fault
code.
5. Check for short circuits between sensor harness
connector pin 1 BVREF and pin 3 sensor signal.
If a short circuit is detected, service the wiring as
necessary. Clear the P0193 code and run a KOER
test to ensure that the problem is resolved.
If no short circuit is detected, go to step 6.
6. Run another KOER test. If the P0193 code returns,
replace the PCMs and run a further test to ensure
that the problem is resolved.
Open the corresponding manual page for wiring diagrams and figures
code P0193 is logged.
If any of P1233, P1235 or P1237 (fuel pump drive
module faults) are logged, resolve these codes
first and return to this procedure only if a P0193
is logged again after clearing any P1233 - 1237
faults
2. Monitor the fuel pressure signals on both fuel
rails using the datalogger.
The fuel system must be capable of maintaining
39-41 psi above manifold pressure in both fuel
rails (
3. If either fuel pressure reading is significantly out
of specification, substitute a good sensor and
repeat the pressure test.
4. If the pressure readings are still significantly different, key off, disconnect the affected sensor.
Key on. Measure the voltage from sensor harness
connector pins 1 and 2.
If +5 volts is available, go to step 5.
If +5 volts is not available. service the sensor wiring to eliminate poor connections. Clear the fault
code.
5. Check for short circuits between sensor harness
connector pin 1 BVREF and pin 3 sensor signal.
If a short circuit is detected, service the wiring as
necessary. Clear the P0193 code and run a KOER
test to ensure that the problem is resolved.
If no short circuit is detected, go to step 6.
6. Run another KOER test. If the P0193 code returns,
replace the PCMs and run a further test to ensure
that the problem is resolved.