SAIS Failure and Trouble Codes

A failure of any component of the SAIS will generally set the check engine light (CEL) and cause the Engine Control Module (ECM)
to store trouble codes. Many of these mechanical failures will also cause the vehicle to enter “limp-mode” where throttle
response is limited to 50% to protect the engine from damage. Before installing the bypass module it is highly recommended to
address any codes not related to the SAIS. The codes below are the most common trouble codes that the bypass kit is able to let
you clear once the kit is installed and the codes are initially reset. Many of these codes can be caused by a failing SAIS Air Pump
which can also cause a loud vacuum cleaner noise for 20-30 seconds after a cold start. After the kit is installed the system is
prevented from operating and the below codes should not come back on, set the CEL or let the vehicle enter into “Limp Mode”

In general, the SAIS Bypass Kit cannot clear codes that are related to electrical faults or circuit malfunctions with the exceptions
of a few below and only under certain circumstances with the addition of a Pump Replacement Pack or a Pressure Sensor Jumper Harness to the bypass kit.

These are the codes the bypass kits (V36W, V36H or V52H) can take care of by themselves.

P1441 - Switching Valve No.2 Stuck Open Bank 1
P1442 - Switching Valve No.2 Stuck Close Bank 1
P1444 - Switching Valve No.2 Stuck Open Bank 2
P1445 - Switching Valve No.2 Stuck Close Bank 2
P2440 - Switching Valve Stuck Open Bank 1
P2441 - Switching Valve Stuck Closed Bank 1
P2442 - Switching Valve Stuck Open Bank 2
P2443 - Switching Valve Stuck Closed Bank 2
P2445 - Pump Stuck OFF Bank 1
* Important cold weather note, see below in red.
P2447 - Pump Stuck Off Bank 2
There is an occasional exception like having a blown air pump fuse or damaged air pressure sensors that will need to be addressed at the same time so the bypass module will work.

Codes the kits can take care of with the addition of a Pressure Sensor Harness(PSH) or Pressure Sensor Replacement(PSR)

P2431 - Air Flow / Pressure Sensor Circuit Range / Performance Bank1
P2432 - Air Flow / Pressure Sensor Circuit Low Bank 1
P2433 - Air Flow / Pressure Sensor Circuit High Bank 1
P2436 - Air Flow / Pressure Sensor Circuit Range / Performance Bank 2
P2437 - Air Flow / Pressure Sensor Circuit Low Bank 2
P2438 - Air Flow / Pressure Sensor Circuit High Bank 2
P106B - Pressure Sensor Correlation / Evap. Pressure Sensor

Only vehicles with two pressure sensors (one must be good) can take advantage of the PSH.
Those vehicles with only one Pressure Sensor or two bad pressure sensors will need to use the PSR*
*We have temporarily stopped selling the PSR until we can find a more reliable parts source for the sensors.

Codes the kits can take care of with the addition of one or two Pump Replacement Packs(PRP)

P0418 - SAIS Circuit/Relay 'A' Circuit Malfunction Bank 1
P0419 - SAIS Circuit/Relay 'A' Circuit Malfunction Bank 2

Usually caused by an open or short circuit in one of the air pump motor windings. One pack is needed for each code.

Codes the kits can take care of with the addition of one or two Valve Replacement Packs (VRP)

P0412 - SAIS Switching Valve 'A' Circuit Malfunction Bank 1
P0415 - SAIS Switching Valve 'A' Circuit Malfunction Bank 2

Usually caused by an open circuit of the solenoid coil in one of the Air Switching Valves. A = Bank1 ASV Solenoid B = Bank2 ASV Solenoid. One pack is needed for each code.





Explanations, Exceptions and Other Codes


C1201 - Engine Control System Malfunction
This is the code we call "the limp mode code". This is the code that indicates your VSC, TRAC and other safety systems have been turned off and you are in limp home mode. Not all scanners can read the C codes but if you are in limp mode it is probably there. Don't worry about this one when you take care of the other trouble codes with a bypass kit this one will clear also.

P2445 - Pump Stuck OFF Bank 1
This code is normally caused by the secondary air injection pump not being able to create proper air pressure because the pump impeller is damaged, the air pump motor has been damaged and or has blown the air pump fuse. If the air pump motor has been damaged it is very common to see a P0418 code also which indicates the pump motor has been damaged. If the air pump fuse has been blown this code will come on but you may not see a P0418 code until the fuse is replaced. If P2445 code only comes on during your cold starts the kit will be able to take care of it.

*On some 05-06 4.7L vehicles there is a known Cold Weather glitch in the ECM. This glitch can occur when operating the vehicle in near freezing or below freezing temps. If the P2445 code comes on and puts you into limp mode in cold weather while you are driving and reach 45-50mph this is a glitch in the ECM and not an instance of P2445 that the kit can prevent.

This ECM glitch has been confirmed on vehicles with and without the bypass kit installed. If the P2445 code comes on as you are driving, there is no problem with the bypass kit or how it is operating, it is a separate issue. If you are experiencing this cold weather glitch the only known solution is an update of your ECM with the correct update (calibration file) for the the ECM. We recommend finding an independent shop that has the ability to update your vehicles ECM. A search in the TIS will show no general update is available which is why the calibration file must be used. The cold weather issue service bulletin was likely deleted after the P0418/P2445 bulletin came out that directs the service manager and techs to just just replace the entire system.

P011B - Temperature Correlation Error
This code is caused when the air intake temp and engine coolant temps are not within a certain range of each during the correlation test on a cold start. This code could be caused by having a damaged pressure sensor that is reading outside the normal range . Or, it could also be from installing one of our V3 or older units on a 2008 or newer vehicle. The V5 and newer units are specifically designed to avoid this problem.

P106B - Pressure Sensor Correlation / Evap. Pressure Sensor
This code is caused when the computer compares three different pressure sensors reading atmospheric pressure after the vehicle has been off for a certain period of time. If one of these sensors reads a pressure that is a certain margin outside the other two sensors the code will be set. It is often caused by a damaged secondary air injections system pressure sensor that is built into one of the air switching valves. The three sensor readings must be compared in the freeze frame data that was stored when the code was set to determine the offending sensor. If one of the SAIS pressure sensors is causing the code a Pressure Sensor Jumper Harness added to a bypass kit can be used to eliminate the code without having to replace the bad air switching valves.

If you have any questions about your trouble codes please use the Contact Us form and include your vehicle information
and trouble codes. We would be glad to tell you what the bypass kit should be able to do for your situation.

SAIS and Other Trouble Codes For Reference Only.

C1201 - Engine Control System Malfunction - VSC and TR(A)C Prohibited
P0101 - MAF Circuit Range/Performance Problem
P0102 - MAF Circuit Low Input
P0103 - MAF Circuit High Input
P0111 - IAT Sensor Circuit Range/Performance Problem
P0112 - IAT Sensor Circuit Low
P0113 - IAT Sensor Circuit High
P0115 - ECT Circuit Malfunction
P0116 - ECT Circuit Range/Performance Problem
P0117 - ECT Circuit Low Input
P0118 - ECT Circuit High Input
P011B - ECT/IAT Correlation
P0412 - Switching Valve Circuit Malfunction Bank 1
P0415 - Switching Valve Circuit Malfunction Bank 2
P0416 - Switching Valve Relay Open Bank 2
P0417 - Switching Valve Relay Shorted Bank 2
P0418 - Relay 'A' Circuit Malfunction Bank 1
P0419 - Relay 'A' Circuit Malfunction Bank 2
P0420 - Catalyst System Efficiency Below Threshold Bank 1
P0430 - Catalyst System Efficiency Below Threshold Bank 2
P144C - Open in SAIS Heater Control Circuit
P144D - Short in SAIS Heater Control Circuit
P1440 - Vacuum Switching Valve Circuit Malfunction Bank 1
P1441 - Switching Valve No.2 Stuck Open Bank 1
P1442 - Switching Valve No.2 Stuck Close Bank 1
P1443 - Vacuum Switching Valve Circuit Malfunction Bank 2
P1444 - Switching Valve No.2 Stuck Open Bank 2
P1445 - Switching Valve No.2 Stuck Close Bank 2
P1603 - Engine Stall History
P1605 - Rough Idle
P1613 - Driver Malfunction Bank 1
P1614 - Driver Malfunction Bank 2
P2431 - Air Flow / Pressure Sensor Circuit Range / Performance Bank1
P2432 - Air Flow / Pressure Sensor Circuit Low Bank 1
P2433 - Air Flow / Pressure Sensor Circuit High Bank 1
P2436 - Air Flow / Pressure Sensor Circuit Range / Performance Bank 2
P2437 - Air Flow / Pressure Sensor Circuit Low Bank 2
P2438 - Air Flow / Pressure Sensor Circuit High Bank 2
P2440 - System Switching Valve Stuck Open Bank 1
P2441 - System Switching Valve Stuck Closed Bank 1
P2443 - System Switching Valve Stuck Closed Bank 2
P2444 - System Pump Stuck ON Bank 1
P2445 - System Pump Stuck OFF Bank 1
P2446 - System Pump Stuck On Bank 2
P2447 - System Pump Stuck Off Bank 2