What does it mean when it says Bank 1?
number one cylinder bank
In the automotive world, Bank 1 refers to the number one cylinder bank, which means it is the bank where the number one cylinder is located. On an inline four cylinder engine, this is the only cylinder bank.
What causes a bank 1 lean code?
What the P0171 code means. The P0171 code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. A lean condition occurs when the engine either receives too little fuel or too much air.
What does it mean when p0171 is too lean Bank 2?
In plain English, this means that the PCM has detected a vacuum leak (it may be real or perceived) and is compensating by injecting the maximum amount allowed (under its program) of fuel into the cylinders for bank 1. P0174: System Too Lean Bank 2. PCM’s Adaptive Fuel Strategy has reached its rich calibrated limit for bank 2.
When do you know you have a lean code?
Step 1 – Once a check engine or service engine soon light has determined a lean engine code has materialized, a repair procedure inspection is needed. Explanation: A lean code is enabled when the computer has detected enrichment adjustments have maxed out, with no results, this inability triggers the lean code.
What does Bank One of the p0138 code mean?
The bank one portion of the code indicates that the issue is on the side of the engine that houses the number one cylinder (only applies to engines with a ‘V’ or boxer configuration). Since the code is for sensor 2, we know that we’re dealing with the downstream oxygen sensor.
When to replace Bank 1 downstream O2 sensor?
If the O2 sensor is reading high voltage and the fuel pressure and coolant temperature are within spec, replace the bank 1 downstream O2 sensor. For error code P0138, one or more of the below repairs may be needed to solve the underlying issue.