Q: Codes p0101, p0131, p0137, p0151 & p0327 I guess I'm asking would replacing the ECM solve the problem? 2002 Chevrolet Blazer

asked by on December 29, 2016

I have a 2002 chevy blazer that has had the service engine code on for about a year. The original code it pulled was the p0101 for the mass air flow sensor. we cleaned it and it went away. The check engine soon light would come on periodically but we just ignored it. Now its pulling all the different codes listed above. This car shows none of the signs of needing the ECM replaced but that is what has been recommended to me. I guess I'm asking if there is an easier place to start? It obviously is an older car and i hate putting large amounts of money into it if its unneeded. The only reason this is a concern is because we live in an area that has e check and we can't get the vehicle registered without passing e check.

My car has 140000 miles.
My car has an automatic transmission.

Oxygen Sensor Replacement $108.80 - $905.23 Get a Quote

Hello - the codes you list (besides the P0101 for the MAF) reference problems with the oxygen sensors and a knock sensor (P0327) for your engine. These are normal higher mileage maintenance items, and do NOT require replacing the ECU. I would recommend oxygen sensor replacement(s) as necessary, and a knock sensor replacement, by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, and make these repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $65/hr

What others are asking

My car is overheating and constantly filling with water

Thats a good question. I will go through a few steps you can take to see where your problem is occurring. Get a UV light and dye to put in your coolant. Run your car until it...

Iod Fuse / Check Engine Light

Your first order of business is to extract the problem codes which are driving the Check Engine light. Hesitation to start when cranking - if this is what you mean - could be a sign of a weak power supply...

My 2000 Chevy Tahoe has a few messages. It says reduced engine power & ending service soon, What could the issue be?

Hello, thank you for writing in. The check engine light, reduced power light, and general loss of power are very likely all connected to one or two simple issues. Luckily with the check engine light on, the computer has detected...

My truck is overheating and when I turn heat on only cold air comes out?

Hi there. Check for any external coolant leaks. Look at the radiator, heater hoses, radiator hoses, heater core, and the core plugs (freeze plugs) on the engine and see if there is any visible coolant leaks. If there is no...

What else can cause an over heating engine. .

Overheating in stop and go traffic can be due to non functioning electric radiator cooling fans. A poorly functioning water pump can be a cause, too, for example if the drive belt is not tight enough. If the car is...

Air not working after alternator repair

There is a chance that the electrical connector that goes to your AC compressor may have gotten disconnected while the alternator was being worked on; it is in close proximity to the alternator and may have been bumped. I would...

I have a 2005 z71 Tahoe with no heat front or rear.

Hello, thank you for writing in. The vehicle may not be allowing the hot coolant to enter the heater core. If the rest of the cooling system seems to be working well, the heater core is likely your problem. This...

Wondering if fuel injector(s) is/are going bad

Although faulty fuel injectors could cause the issue you are describing, the symptoms associated with the diagnostic trouble code you found, namely P0344 are consistent with the symptoms that you are reporting. Consequently, you are better off resolving the fault(s)...

While driving my car will shut off if you start it again it will act like it's flooded for about 10 minutes then will start?

You should get the fuel pressure checked and the computer scanned. If running too rich then your fuel pressure may be too high or you have a leaking injector. A computer test will tell you if you have a sensor...

Related articles

P0124 OBD-II Trouble Code: Throttle Pedal Position Sensor/Switch (TPS) A Circuit Intermittent
P0124 P0124 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Intermittent What the P0124 code means P0124 is the generic OBD-II code that indicates the TPS sensor circuit A output voltage goes below or above the sensor's...
P2125 OBD-II Trouble Code: Throttle/Pedal Position Sensor/Switch "E" Circuit
P2125 P2125 code definition P2125 is a general OBD-II trouble code indicating a fault with the throttle/pedal position sensor/switch “E” circuit. This code is similar to many other throttle body and pedal position codes. What the P2125 code means The...
Symptoms of a Bad or Failing Crankshaft Position Sensor
Common signs of a faulty crankshaft position sensor include issues starting the vehicle, intermittent stalling, and the Check Engine Light coming on.