I HAVE THREE TROUBLE CODES P0030P0131 AND P2431

2006 Chevrolet Cobalt

Tiny

Christopher Meade

February, 17, 2013 AT 6:54 PM

I have three trouble codes, p0030, p0131, and p2431. I know the first two are 02 sensor codes, are they all related? What is the repair?

FOUND 902 RELATED QUESTIONS

1 Answer

Tiny

hmac300

February, 17, 2013 AT 7:03 PM

They are not related the third one is secondary air system the first two may be the O2 sensor here is test procedure for secondary air.
CIRCUIT/SYSTEM TESTING

1. With the ignition ON and the engine OFF, observe the AIR Pressure Sensor parameter with a scan tool while manipulating all related wiring and connectors.
? If manipulation does affect the AIR Pressure Sensor parameter then repair the harness or connector.
2. With the ignition ON, the engine OFF, and the solenoid valve disconnected, measure for 5 volts between the 5 volt reference circuit and ground.
? If more than 5 volts then test the 5 volt reference circuit for a short to voltage or a faulty control module.
? If less than 5 volts then test the 5 volt reference circuit for high resistance, a short to ground, or a faulty control module.
3. With the ignition ON, the engine OFF, and the solenoid valve disconnected, measure for 0 volts between the low reference circuit and ground.
? If more than 0 volts then test the low reference circuit for a short to voltage or a faulty control module.
4. With the ignition ON, the engine OFF, and the solenoid valve disconnected, inspect for an AIR Pressure Sensor parameter reading on a scan tool of 0 volts.
? If more than 0 volts then test the signal circuit for a short to voltage or a faulty control module.
5. With the ignition ON, the engine OFF, the solenoid valve disconnected, and a 3 amp fused jumper wire connected between the signal and 5 volt reference circuits, inspect for an AIR Pressure Sensor parameter
reading on a scan tool of 5 volts.
? If less than 5 volts then test the signal circuit for high resistance, a short to ground, or a faulty control module.
6. With the ignition ON, the engine OFF, the solenoid valve disconnected, a 300 ohm fixed resistor an appropriate length of secondary ignition wire may be adequate installed between the 5 volt reference circuit and
the low reference circuit, and a 3 amp fused jumper connected from the signal circuit to the 5 volt reference circuit at the fixed resistor, observe an AIR pressure sensor parameter reading on a scan tool of 5 volts.
? If less than 5 volts then test the 5 volt reference circuit and the signal circuit for high resistance or a faulty control module.
7. With the ignition ON, the engine OFF, the solenoid valve disconnected, a 300 ohm fixed resistor an appropriate length of secondary ignition wire may be adequate installed between the 5 volt reference circuit and
the low reference circuit, and a 3 amp fused jumper connected from the signal circuit to the low reference circuit at the fixed resistor, inspect for a pressure sensor parameter reading on a scan tool of 0 volts.
? If more than 0 volts then test the low reference circuit for high resistance or a faulty control module.
8. If all circuits and the control module test OK then replace the solenoid valve.
You may have a short in voltage to O2 sensor. Also check fuse emission 1

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