Aston Martin diagnostic trouble code
P0059: HO2S Heater Resistance (Bank 2, Sensor 1)
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
- Oxygen sensors
- Manual coverage
- V8 Vantage, DB9
- Warning-lamp status
- V8 Vantage: MIL; DB9: MIL
What Aston Martin code P0059 means
HO2S Heater Resistance (Bank 2, Sensor 1)
DB9 preliminary diagnostic manual · section 2-4
Manufacturer fault-analysis procedure
Manual fault definition
P0053 - HO2S 1-1 heater circuit malfunction
P0054 - HO2S 1-2 heater circuit malfunction
P0059 - HO2S 2-1 heater circuit malfunction
P0060 - HO2S 2-2 heater circuit malfunction
P0054 - HO2S 1-2 heater circuit malfunction
P0059 - HO2S 2-1 heater circuit malfunction
P0060 - HO2S 2-2 heater circuit malfunction
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.
CAUTION: The heater voltage will begin to switch
as the heater warms up. Note only the initial
steady state voltage before switching begins.
Primary or Secondary Powertrain Control Module
(PCM). Check that you are working on the correct
half of the engine.
CAUTION: The heater voltage will begin to switch
as the heater warms up. Note only the initial
steady state voltage before switching begins.
Test sequence and decision path
1. Access the oxygen sensor connections and visually inspect for exposed wires, contamination,
corrosion and proper assembly. Service or repair
any obvious defects.
2. Connect the WDS or scan tool. Record all logged
DTCs and then clear both PCMs. Start the engine
and run at idle until fully warmed up. Run the
KOER test sequence from the WDS. Check which
of the codes P0053, P0054, P0059 or P0060 is
present. Switch off the engine.
3. Disconnect the appropriate heated oxygen sensor
and inspect both ends of the connectors for damaged or pushed out pins, moisture, corrosion,
contamination, etc. Service as necessary.
4. Install the oxygen sensor break-out lead. Connect
a voltmeter between +12 volt power (pin 1) and
the heater return lines (pin 2) at the break-out
lead. Switch on the ignition and immediately
note the steady peak voltage. The voltage should
be above 10.5 volts. Switch off the ignition.
5. If a low voltage was detected in step 4, check for
a partial or complete open circuit in the heater
power or heater return lines to the sensor connector. Repair the wiring as necessary.
6. If the applied voltage measured in step 4 is above
10.5 volts, check the resistance of the HO2S
heater which should be between 3 and 5
Ω
when
cold. If the heater resistance is not within range,
replace the oxygen sensor.
7. If the heater resistance is in specification, check
for a short circuit to ground within the sensor.
Measure from the sensor power connection to the
sensor case. If the resistance is less than 10k
Ω
,
replace the sensor.
8. If the resistance in step 7 is greater than 10k
Ω
,
Check for shorts to other grounds and to Vpower
in the heater ground harness circuits. If the resistance reading is less than 10k
Ω
repair or replace
the affected wiring.
9. If continuity is good, consult Aston Martin Technical Support.
Open the corresponding manual page for wiring diagrams and figures
corrosion and proper assembly. Service or repair
any obvious defects.
2. Connect the WDS or scan tool. Record all logged
DTCs and then clear both PCMs. Start the engine
and run at idle until fully warmed up. Run the
KOER test sequence from the WDS. Check which
of the codes P0053, P0054, P0059 or P0060 is
present. Switch off the engine.
3. Disconnect the appropriate heated oxygen sensor
and inspect both ends of the connectors for damaged or pushed out pins, moisture, corrosion,
contamination, etc. Service as necessary.
4. Install the oxygen sensor break-out lead. Connect
a voltmeter between +12 volt power (pin 1) and
the heater return lines (pin 2) at the break-out
lead. Switch on the ignition and immediately
note the steady peak voltage. The voltage should
be above 10.5 volts. Switch off the ignition.
5. If a low voltage was detected in step 4, check for
a partial or complete open circuit in the heater
power or heater return lines to the sensor connector. Repair the wiring as necessary.
6. If the applied voltage measured in step 4 is above
10.5 volts, check the resistance of the HO2S
heater which should be between 3 and 5
Ω
when
cold. If the heater resistance is not within range,
replace the oxygen sensor.
7. If the heater resistance is in specification, check
for a short circuit to ground within the sensor.
Measure from the sensor power connection to the
sensor case. If the resistance is less than 10k
Ω
,
replace the sensor.
8. If the resistance in step 7 is greater than 10k
Ω
,
Check for shorts to other grounds and to Vpower
in the heater ground harness circuits. If the resistance reading is less than 10k
Ω
repair or replace
the affected wiring.
9. If continuity is good, consult Aston Martin Technical Support.