Engine throwing a bunch of codes

4turboho

New Member
Jan 31, 2009
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WEll I have a 91 mustang here with a stock 2.3l motor dual plug. Its throwing 5 different codes

172--Oxygen sensor not switching - system is or was lean - Single, Right or Rear HO2S - Fuel control

181--Fuel system was lean at part throttle Single, Right or Rear HO2S - Fuel control

186--Injector pulse width longer than expected or Mass Air Flow (MAF) lower than expected - Fuel control ///(Its actually the baro sensor)

327--EGR feedback signal is/was low - EVR or PFE

334--EVP sensor is/was high - EVR

Ok now it all started about 2 months ago and it was throwing code 186 I had all the codes erased from the computer like 3 weeks ago and the light stayed off for about 20 miles and drove good during that time. Then the light came back on and I check the code it was again 186. Now I checked the codes again a few days ago and now its throwing all 5 codes.

Ive cleaned the egr and the diaphram moves and I cleaned the MAF sensor(it was clean to begin with) And I've replaced the Baro sensor

Any ideas what to do? Any help would be greatly appreciated!
 
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sometimes the throttle position sensor goes bad and can mess everything up. My mustang was throwing a bunch of codes like that a while ago too. I knew my o2 sensor had to be bad because it had never been changed that i know of. so i replaced that, cleaned the maf sensor and replaced the throttle position sensor (TPS). Ever sense then it has ran fine. It is still throwing a couple codes, but its not related to any of that. TPS is an easy sensor to replace, its cheap, like $25 at advanced auto, and it gives you the perfect opportunity to clean out your throttle body and IAC. And if that doesn't help, well now you know that you have a new sensor that is working the way its supposed to, and you got to clean an important part of your intake system.



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