Audi Q5 P0505: Idle Air Control System- Malfunction

P0505 is an OBDII code that deals with the idle air control system in the Audi Q5.  It’s a generic code, which means that it has the same meaning for the Q5 as it would any other vehicle (Q5 or not). P0505:  Idle Air Control System:  Malfunction When P0505 is triggered, it is typically caused … Read more

Audi Q5 P0158: Oxygen Sensor High Voltage (Bank 2 -Sensor 2)

  P0158 is an OBDII code that occurs in many vehicles, including the Audi Q5. The code is triggered when: The voltage at the O2 sensor remains above threshold for 20 seconds or more Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself There are also some less likely problems … Read more

Audi Q5 P0153: Oxygen Sensor Slow Response (Bank 2 – Sensor 1)

    P0153 is a common OBDII code that occurs in many vehicles, including the Audi Q5. The code is triggered when there is an issue with the response time from the O2 sensor when switching voltage levels. The Oxygen sensor is responsible for helping the ECM monitor oxygen levels in the exhaust in order to … Read more

Audi Q5 P0402: EGR → Excessive Flow Diagnosis

  P0402 is an OBDII trouble code that’ll pop up in the Audi Q5. It has to do with the emissions system and stands for: P0402: EGR → Excessive Flow Diagnosis The EGR system on a vehicle is responsible for recirculating exhaust gasses in order to lower the vehicles emissions output. The amount of gas … Read more

Audi Q5 P0139: O2 Sensor Slow Response (Bank 1 – Sensor 2)

P0139 is a common OBDII code that occurs in many vehicles, including the Audi Q5. The code is triggered when there is an issue with the response time from the oxygen (O2) sensor when switching voltage levels. The Oxygen sensors are responsible for helping the ECM meter oxygen levels in the exhaust, and helping to … Read more

Audi Q5 P0140: O2 Sensor → No Activity Detected B1S2

P0140 is a generic OBDII trouble code. It has the same meaning for any vehicle with OBDII, including the Audi Q5. It means that the PCM/ECM is not detecting any activity from the sensor.  It doesn’t mean that the O2 sensor isn’t getting power, but that the voltage isn’t changing, which is the “no activity”. … Read more

Audi Q5 P0137: O2 Sensor Low Voltage (Bank 1 -Sensor 2)

  P0137 is a fairly common OBDII code that occurs in the Audi Q5, it’s a general code.  This means that it has the same meaning for any vehicle. This code is supposed to let you know that there is an issue with the wiring or harness going to the sensor, or the sensor itself is … Read more

Audi Q5 P0151 Code: Meaning, Causes, How to Fix

The P0151 code is an OBD-II diagnostic trouble code that indicates low voltage in the Audi Q5’s Oxygen (O2) sensor circuit located at Bank 2, Sensor 1 (B2S1). The B2S1 O2 sensor plays a crucial role in maintaining optimal engine performance by detecting the air-fuel ratio in the exhaust, then sending this data to the … Read more