Recently had a check engine light come one. Autozone narrowed it down to a P1189 code but they could not tell me what it meant. I have researched all over the internet and have come to the Fuel Control Bank 2 Sensor 1. Is that difficult to fix myself or do I need to take it to a mechanic? I am fairly handy if I have directions, and I don't have the money, or the desire, to visit the BMW dealership. Any help is appreciative, thanks!
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PO128 -- engine coolant low or thermostat not working
P0440 - EVAP system malfunction, gas cap loose - Cat convertors missing from car can cause this
P1189 - Engine Oil Pressure Switch Circuit -- CAT CONVERTORS MISSING FROM CAR can cause this.
The check engine light comes on when there's a definitive problem, so there will be a code. AutoZone should be able to read the codes for free and that will tell you what the problem is.
Ask when you get the codes and the problem can be narrowed down.
you need to get the codes read from the computer. those will help to narrow it down. you can buy any obd2 meter and the just plug it in to t.he port by the brake pedal and it will read the codes and tell you. the codes will help narrow down if this is a fuel, electrical, air or sensor problem as loosing power can be from multiple causes. Any shop can read the codes and give you an estimate. even some part places like autozone or pepboys do itbfor free.
If the check engine light is on then I would take it to your local autozone they can hook it up to a scan tool free of charge that will tell you what codes are being thrown. Once you have those it will narrow down the problems greatly. thank you, Lee
Take the vehicle to your local autozone they will be able to scan the trouble codes and tell you what code is causing the light to come on. That will help you narrow down what the issue is. Thank you, Lee
The check engine light comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to AutoZone or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.
A flashing check engine light is an indication of a severe misfire or problem that is likely to harm your engine. Immediate diagnosis and service is needed.
Some specific causes for the light to be on are:
Gas cap left off, not tightened, not installed correctly, or needs to be replaced
02 sensor
Engine misfire - error might clear itself after 3 complete warm-up cycles; not restarts, but warm-ups
At start up for a bulb check - Should not stay on
Problem in the emission system, including clogged exhaust or the catalytic converter not functioning properly
Dirty/clogged air filter
Dirty MAF sensor
There are pages and pages of items that can cause a check engine light to come on. Having it checked with a scan tool will narrow down the problem area.
Not all systems are able to be read by your local auto parts store. For '95 and earlier cars, OBD I is used and can NOT be read by AutoZone or Advanced Auto. A simple paper clip can be used to jump 2 ports on the diagnostic port and have the Engine light flash a certain sequence. This will then tell you the code to refer to for troubleshooting.
The computer has detected a malfunction and set a code. Have it checked for codes with a scan tool. There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
p1188: Fuel Control (Bank 1 Sensor 1) p1189: Fuel Control (Bank 2 Sensor 1) p0171 and p0173: These are very common codes on BMW's which can also be false codes, try
clearing the codes and run the test again they may not come up again. p1250: Never came across that....
take your tahoe to autozone for a free "check engine" light test. This will not tell you the pin point problem, but will narrow is down to at two to three errors.
SAE Code
P1188
DTC Code
17596
Description
Linear 02 Sensor / Compensator Resistor Short to ground
SAE Code
P1189
DTC Code
17597
Description
Linear 02 Sensor / Compensator Resistor Short to B+
SAE Code
P0170
DTC Code
16554
Description
Fuel Trim, Bank1 Malfunction
Basically you need a new oxygen sensor, The fuel trim code is from the computer trying to adjust the fuel/Air mixture to compensate for the bad signal from the sensor. Just change the one closer to the engine, the one behind the Catalytic converter will thow a different code when it fails.
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