How is fault code P0472 fixed?

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Read live data and look at the actual sensor voltage with the ignition on. P0472 means it's reading low, often pinned near zero, which points at a short or a dead sensor rather than a marginal one 2. Get under the car and unplug the sensor connector. Check for green corrosion, bent pins and damp. A clean and reseat fixes a fair few of these before you spend a penny 3. Pull the pressure tubes off and check they're clear and not split. A blocked or cracked pipe gives the sensor nonsense to measure 4. Test the 5V supply at the sensor with a multimeter, ignition on. No supply or a low reading sends you back up the wiring towards the ECM 5. Back-probe the signal wire and compare voltage at the sensor against the ECM pin to find a break or short between the two 6. If supply and wiring are good and the tubes are clear, the sensor itself is the likely fault. Replace it and clear the code

Exhaust Pressure Sensor Low

Jump to the fix

Severity

Low

Can I keep driving?

Usually drivable; have it fixed at the first opportunity.

First step

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Read live data and look at the actual sensor voltage with the ignition on. P0472 means it's reading low, often pinned near zero, which points at a short or a dead sensor rather than a marginal one 2. Get under the car and unplug the sensor connector. Check for green corrosion, bent pins and damp.

PPowertrain
0Generic code
4Emissions
72Sequence number

What does it mean?

P0472 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Exhaust Pressure Sensor Low . This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

Symptoms

Likely causes

How to fix it

Codes From the Same System

All Fault Codes

Related Similar Codes

This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.