OBD2 Info Guides

To fix P0135, confirm the code, inspect the Bank 1 Sensor 1 oxygen sensor connector, test the heater fuse, check…

P0135 causes usually include a failed upstream oxygen sensor heater, damaged wiring, a blown fuse, corroded connector pins, poor ground,…

P0135 symptoms usually start with a check engine light, poor fuel economy, rough cold starts, and higher emissions. The code…

P0135 means the engine computer found a fault in the oxygen sensor heater circuit for Bank 1 Sensor 1. This…

P0133 repair cost usually ranges from $150 to $650 when the problem is an upstream oxygen sensor, wiring issue, or…

To fix P0133, scan the vehicle, confirm Bank 1 Sensor 1, inspect the oxygen sensor wiring, check for exhaust or…

P0133 causes usually include a slow upstream oxygen sensor, damaged sensor wiring, exhaust leaks, vacuum leaks, fuel pressure issues, or…

P0155 means the oxygen sensor heater circuit for Bank 2 Sensor 1 is not working properly. The main causes include…

P0172 symptoms usually include a check engine light, poor fuel economy, rough idle, fuel smell, black exhaust smoke, hesitation, and…

P0172 means “Fuel System Too Rich Bank 1.” Your engine computer sees too much fuel or not enough air in…

P0171 repair cost usually ranges from $100 to $1,500, based on the real cause. A small vacuum leak or dirty…

Quick Answer P0171 means the engine is running too lean on Bank 1. This happens when too much air or…

Quick Answer: P0171 means the engine is running too lean on Bank 1, meaning too much air or not enough…

P0171 means the engine is running too lean on Bank 1, meaning too much air or too little fuel. Common…

P0171 means the engine is running too lean on Bank 1, meaning too much air and not enough fuel in…