Help with codes
Help with codes My buddy has a 99 T/A mostly stock, and it has been throwing DTC P0412,410, and 418. This is showing something with the secondary air injection. I guess I am not very familiar with this code. All help is appreciated. Also the car is A4 and has had the smog pump removed.
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Joined: Dec 2004
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From: Beaumont, TX
DTC P0410 Secondary Air Injection (AIR) System
An AIR pump is used on this vehicle to lower tail pipe emissions on start-up. The PCM supplies a ground to the AIR pump relay, which energizes the AIR pump.
The PCM monitors the HO2S voltages to diagnose the AIR system.
During the AIR test the PCM activates the AIR pump during closed loop operation. When the AIR is activated, the PCM monitors the HO2S voltages and short term fuel trim values for both banks of the engine. If the AIR system is operating properly, the HO2S voltages should go low and the short term fuel trim should go high.
If the PCM determines that the HO2S voltages for BOTH banks did not respond as expected during the tests, DTC P0410 sets. If only one sensor responded, the PCM sets either a DTC P1415 or P1416 to indicate on which bank the AIR system is inoperative.
DTC P0412 Secondary Air Injection (AIR) Solenoid Relay Control Circuit
The PCM controls the relay by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the component being controlled. Each driver has a fault line which the PCM monitors. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential of the circuit should be high (near the battery voltage). If the fault detection circuit senses a voltage other than what is expected, the fault line status changes causing the DTC to set.
The relay controls the high current flow to the AIR injection pump integral bypass valve. This allows the PCM driver to only have to control the relatively low current used by the relay.
DTC P0418 Secondary Air Injection (AIR) Pump Relay Control Circuit
This relay controls the high current flow to the AIR injection pump. This allows the PCM driver to only have to control the relatively low current used by the relay.
You'd probably want to just remove the AIR and EGR systems entirely, instead of trying to 'fix' it...
http://www.ls1camaro.net/sections.ph...ticle&artid=70
https://ls1tech.com/forums/pcm-diagnostics-tuning/203481-hp-tuners-removing-air-egr-rear-o2-s-did-search-want-clear.html
https://ls1tech.com/forums/generation-iii-external-engine/202581-how-difficult-remove-air-egr-help.html
An AIR pump is used on this vehicle to lower tail pipe emissions on start-up. The PCM supplies a ground to the AIR pump relay, which energizes the AIR pump.
The PCM monitors the HO2S voltages to diagnose the AIR system.
During the AIR test the PCM activates the AIR pump during closed loop operation. When the AIR is activated, the PCM monitors the HO2S voltages and short term fuel trim values for both banks of the engine. If the AIR system is operating properly, the HO2S voltages should go low and the short term fuel trim should go high.
If the PCM determines that the HO2S voltages for BOTH banks did not respond as expected during the tests, DTC P0410 sets. If only one sensor responded, the PCM sets either a DTC P1415 or P1416 to indicate on which bank the AIR system is inoperative.
DTC P0412 Secondary Air Injection (AIR) Solenoid Relay Control Circuit
The PCM controls the relay by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the component being controlled. Each driver has a fault line which the PCM monitors. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential of the circuit should be high (near the battery voltage). If the fault detection circuit senses a voltage other than what is expected, the fault line status changes causing the DTC to set.
The relay controls the high current flow to the AIR injection pump integral bypass valve. This allows the PCM driver to only have to control the relatively low current used by the relay.
DTC P0418 Secondary Air Injection (AIR) Pump Relay Control Circuit
This relay controls the high current flow to the AIR injection pump. This allows the PCM driver to only have to control the relatively low current used by the relay.
You'd probably want to just remove the AIR and EGR systems entirely, instead of trying to 'fix' it...
http://www.ls1camaro.net/sections.ph...ticle&artid=70
https://ls1tech.com/forums/pcm-diagnostics-tuning/203481-hp-tuners-removing-air-egr-rear-o2-s-did-search-want-clear.html
https://ls1tech.com/forums/generation-iii-external-engine/202581-how-difficult-remove-air-egr-help.html
