What do all these codes mean PO135-PO300-PO404-PO102-PO440

SOURCE: I have a 2008 chevy impala. The car suddenly

ur vehicle is in limp mode[ a safe mode ] which will get u home trying not to cause any damage to engine --theirs a few reasons the vehicle will do this-low oil pressure-transmission problem-have vehicle scanned most auto stores such as auto zone / advanced auto [check ur local area]do this service for free the code gives u a start point towards resolving ur problem

Tech jk

• 102 Answers
• Posted on Jan 16, 2009

SOURCE: 2002 chevy impla v6 esngine

Code p0102, on either the 3.4 or 3.8 (3800) v6 engine is a problem in the Mass Air Flow sensor (MAF). If any work has been done to it just prior to this code, then you need to make sure the air cleaner, duct work, breather tubes, etc. are properly connected and not loose. If that is OK, then may have a bad, or dirty sensor.
Tech JK

SOURCE: service engine light blinks,code read out of po300

Code p0300 is the code for "random missfire detected". The "check engine" light is flashing to warn you that severe damage is being done to the catalytic converter.(very expensive)..

SOURCE: p134, p0141, po300, po130 and po135. 2005 Sunfire.

Given that most of the trouble codes are for the O2 sensor, I think I would change it. The multiple misfires could be because of improper fuel/air mixture caused by a bad sensor. Disconnect the negative(-) battery terminal then change the sensor. Disconnecting the negative(-) should reset the computer and allow the fuel/air mixture to return to default allowing the engine to start.
P0130 - O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0134 - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
P0135 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0300 - Random/Multiple Cylinder Misfire Detected