![]() ![]() Once the enabling conditions are met, then the test conditions can be run.Ħ. MAF measured in milligrams per stroke - but basically the MAF has a wide range Air flow was complex as a function of engine speed (basically not below 640RPM)Ĥ. Barometric sensor in the control module was basically an altitude sensor of pressure of a realistic maximum of 8,000 feet (6,000 under some conditions).ģ. Coolant temperature sensor = -10C to 70C (the intake air temperature is not an enabling condition)Ģ. Mike looked up the 2002 M54 engine and found the following parameter that are called "enabling conditions".ġ. He told me that all the SAS codes are electrical - but the 2Air monitor is for air flow. Mike McCarthy is a mechanical engineer who knows a lot about this stuff. I may not have transcribed everything he said accurately, but here is how I remember what he told me. His name and number was in another thread, and the org chart is reproduced below. I found that out just around 415pm tonight, when the chief technology officer of the California air resource board gave me a call and spoke to me for about 45 minutes. But I probably need to look more closely at it since the register seems to be a test that requires the oxygen sensor to detect air flow during a cold start. There are no codes for anything, so, that's why I had assumed the secondary air system is working anyway. My secondary air system appears to be working, at least electrically, because there are no codes for the secondary air system. How does the BMW engine measure these Pcodes?Ĭlick to expand.Thanks sudoer for that information. So, since I don't have any of those codes, isn't it a fair assumption that my secondary air injection system is working? My Maxiscan MS309 says it "Retrieves generic (P0, P2, P3, and U0), and Manufacture Specific (P1, P3, and U1) codes, and pending codes. P2447 Secondary Air Injection System Pump Stuck Off P2446 Secondary Air Injection System Pump Stuck On P2445 Secondary Air Injection System Pump Stuck Off P2444 Secondary Air Injection System Pump Stuck On P2443 Secondary Air Injection System Switching Valve Stuck Closed P2442 Secondary Air Injection System Switching Valve Stuck Open P2441 Secondary Air Injection System Switching Valve Stuck Closed P2440 Secondary Air Injection System Switching Valve Stuck Open P2439 Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/Erratic P2438 Secondary Air Injection System Air Flow/Pressure Sensor Circuit High P2437 Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low P2436 Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance P2435 Secondary Air Injection System Air Flow/Pressure Sensor Circuit ![]() P2434 Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/Erratic P2433 Secondary Air Injection System Air Flow/Pressure Sensor Circuit High P2432 Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low P2431 Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance P2430 Secondary Air Injection System Air Flow/Pressure Sensor Circuit P2260 Secondary Air Injection System Control "B" Circuit High P2259 Secondary Air Injection System Control "B" Circuit Low P2258 Secondary Air Injection System Control "A" Circuit High ![]() P2257 Secondary Air Injection System Control "A" Circuit Low SECONDARY AIR SYSTEM MONITOR SERIESP1454 Secondary Air Injection Pump With Series Resistor Control Circuit Electrical P1453 Secondary Air Injection Pump Relay Control Circuit Electrical P1432 Secondary Air Injection System Incorrect Flow Detected P1423 BMW-FC=245,80 Secondary Air System (Bank 1) P1421 BMW-FC=246,81 Secondary Air System (Bank 2) P1420 Secondary Air Valve Control Circuit Electrical P1414 BMW 35,Secondary Air Injection Pump Relay Control Circuit Signal High, P1413 BMW 35,Secondary Air Injection Pump Relay Control Sircuit Signal Low, P0492 BMW 246,Secondary Air Injection System Insufficient Flow (Bank 2), P0491 BMW 245,Secondary Air Injection System Insufficient Flow (Bank 1), P0419 Secondary Air Injection System Control "B" Circuit P0418 Secondary Air Injection System Control "A" Circuit P0417 Secondary Air Injection System Switching Valve "B" Circuit Shorted P0416 Secondary Air Injection System Switching Valve "B" Circuit Open P0415 Secondary Air Injection System Switching Valve "B" Circuit P0414 BMW 62,Secondary Air Injection System Switching Valve A Circuit Shorted, P0413 BMW 62,Secondary Air Injection System Switching Valve A Circuit Open, P0412 Secondary Air Injection System Switching Valve "A" Circuit P0411 Secondary Air Injection System Incorrect Flow Detected What are all the BMW DTC diagnostic trouble codes? From this thread, there are almost fifty possible secondary air system pcodes! ![]()
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