Aston Martin diagnostic trouble code
P0224: Throttle/Pedal Position Sensor B Circuit Intermittent
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 P0224 means
Throttle/Pedal Position Sensor B Circuit Intermittent
DB9 preliminary diagnostic manual · section 2-66
Manufacturer fault-analysis procedure
Manual fault definition
P0224 - Throttle position sensor (TP2) intermittent.
Cautions and notes
CAUTION: This code may be generated in the
Primary or Secondary Powertrain Control Module
(PCM) Check that you are working on the correct
half of the engine.
Primary or Secondary Powertrain Control Module
(PCM) Check that you are working on the correct
half of the engine.
Test sequence and decision path
1. Connect the WDS or scan tool. Confirm that a
code P0224 is logged.
2. Access the following Throttle Potentiometer signals:
Throttle Potentiometer Track 1
Throttle Potentiometer Track 2
Key on, monitor the potentiometer readings
whilst moving the throttle pedal gently through its
full range of movement.
The TP signals should change smoothly within the
range 0.66 volts at closed throttle to 4.78 volts at
full throttle.
If any TP signal is erratic, go to step 3.
If any TP signal is constantly low, go to step 4.
3. For erratic TP readings, suspect a defective throttle potentiometer, Fit a replacement throttle body.
Reset the PCMs and run a KOER test to ensure
that the problem is resolved.
4. For low TP readings, disconnect the throttle unit
connector. Key on. Check the +5 volts reference
supply from the PCM at throttle unit harness connector pin 3 reference chassis ground and reference TPRTN at connector pin 2.
If +5 volts is not available, Install the PCM breakout box. Check the PCM +5 volt output at pin
C0636-18 (primary) or pin C2464-18 (secondary).
If +5 volts is not available, change the PCMs and
run a KOER test to ensure that the problem is
resolved.
If +5 volts is available, there is an open circuit in
the +5 volt line from the PCM to throttle unit pin
3. Service the wiring as necessary.
Reset the PCMs and run a KOER test to ensure
that the problem is resolved.
Open the corresponding manual page for wiring diagrams and figures
code P0224 is logged.
2. Access the following Throttle Potentiometer signals:
Throttle Potentiometer Track 1
Throttle Potentiometer Track 2
Key on, monitor the potentiometer readings
whilst moving the throttle pedal gently through its
full range of movement.
The TP signals should change smoothly within the
range 0.66 volts at closed throttle to 4.78 volts at
full throttle.
If any TP signal is erratic, go to step 3.
If any TP signal is constantly low, go to step 4.
3. For erratic TP readings, suspect a defective throttle potentiometer, Fit a replacement throttle body.
Reset the PCMs and run a KOER test to ensure
that the problem is resolved.
4. For low TP readings, disconnect the throttle unit
connector. Key on. Check the +5 volts reference
supply from the PCM at throttle unit harness connector pin 3 reference chassis ground and reference TPRTN at connector pin 2.
If +5 volts is not available, Install the PCM breakout box. Check the PCM +5 volt output at pin
C0636-18 (primary) or pin C2464-18 (secondary).
If +5 volts is not available, change the PCMs and
run a KOER test to ensure that the problem is
resolved.
If +5 volts is available, there is an open circuit in
the +5 volt line from the PCM to throttle unit pin
3. Service the wiring as necessary.
Reset the PCMs and run a KOER test to ensure
that the problem is resolved.