Greta Jimenez
The Anti-Pollution Fault message is a common issue faced by Peugeot owners, often indicating a problem with the vehicle's emission control system. This fault can be caused by various factors, including faulty sensors, clogged catalytic converters, or issues with the exhaust system. The warning message, which is often accompanied by a check engine light, can be disconcerting for Peugeot owners, and it is crucial to address it promptly to avoid further complications and ensure the vehicle meets emission standards. The appearance of the Anti-Pollution Fault warning light on the dashboard, usually in yellow or orange, is one of the first warning signs, indicating a potential issue with the emission control system.
| Characteristics | Values |
|---|---|
| Nature of the Fault | Generic error associated with many issues |
| Cause | Faulty sensors, clogged catalytic converter, clogged filters, exhaust problems, incorrect fuel/air ratio, worn spark plugs, malfunctioning oxygen sensor, faulty catalytic converter, issues with the exhaust gas recirculation (EGR) system |
| Models Affected | Peugeot 206, 207, 307, 308 |
| Symptoms | Reduced engine performance, higher fuel consumption, unusual exhaust emissions, warning lights on the dashboard, constant overheat warning, engine idling problems, engine misfires, sluggish acceleration, failing emissions tests |
| Solution | Check actual error codes, get the vehicle inspected by a qualified technician |
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What You'll Learn
Faulty sensors
The "anti-pollution fault" message on a Peugeot 206 is a generic error that could be associated with many issues. In some cases, the issue may be caused by a faulty sensor.
One possible cause of the "anti-pollution fault" message on a Peugeot 206 is a faulty inlet cam position sensor. This was the case for one person who encountered the issue with their Peugeot 308. Another potential cause could be a faulty battery, as one user with a Peugeot 206 reported that the issue was caused by their battery starting to fail.
For the Peugeot 207, a common cause of the "anti-pollution fault" message is a failing engine ECU (engine control unit). This issue affects vehicles built between 2007 and 2015 with 1.4 and 1.6-litre engines, as well as higher-powered VTi and GT CC versions. A faulty ECU can cause engine misfires, sporadic fault codes for various engine sensors, and constant overheat warning lights on the dashboard. It may also cause the coolant fan to run constantly and lead to engine idling problems.
To diagnose the specific cause of the "anti-pollution fault" message, it is recommended to check the actual error codes using a code reader. These codes will help identify the root of the problem. In some cases, the issue may be as simple as a loose connection or corrosion on the connectors and grounding points, which should be inspected.
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Clogged catalytic converter
The "anti-pollution fault" message on a Peugeot 206 is a generic error that could be associated with many issues. One of the issues causing this error message could be a clogged catalytic converter.
A catalytic converter for a Peugeot 206 can cost between £150 and £300, depending on the model, engine specifications, and brand. Dense or opaque smoke coming from the catalytic converter is one of the advance warning signs of a clogged catalytic converter. An unusual noise when accelerating can also indicate that the catalytic converter is clogged. If your Peugeot 206 stalls regularly, starts losing power, or experiences an abnormal increase in fuel consumption, the catalytic converter may be malfunctioning.
If you are experiencing an anti-pollution fault with your Peugeot 206, it is recommended to check the fault codes and live data upstream/downstream oxygen sensors to determine if the catalytic converter is faulty. It is not uncommon for these sensors to fail or be sensitive to non-compatible or cheap catalytic converter replacements. Therefore, it is essential to use type-approved replacement parts.
If you are unsure about how to diagnose or resolve the issue, it is best to take your vehicle to a proper garage or a Peugeot dealer to have it checked by a professional mechanic.
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Faulty oxygen sensor
The "anti-pollution fault" message on a Peugeot 206 is a generic error that could be associated with many issues. One of the possible causes is a faulty oxygen sensor.
The oxygen sensor, also known as the lambda sensor, measures the oxygen level in the exhaust gases. This information is used by the central computer (ECU or PCM) to control the fuel injection and allow the engine to work efficiently. The Peugeot 206 usually has two oxygen sensors. The main one is located in the inlet of the catalytic converter, monitoring the gases that come out of the engine. The second one is in the catalytic converter outlet, monitoring the performance of the catalytic converter.
A faulty oxygen sensor can cause extremely pollutant gases to be released into the atmosphere. The sensor usually begins to fail after the car has driven between 55,000 and 90,000 miles (90,000 to 140,000 km), and replacement is recommended at this point.
To diagnose a faulty oxygen sensor, a diagnostic scan to check for fault codes is recommended. This will eliminate guesswork and identify the specific issue. Replacing the sensor can be done by the owner, but if repairs are beyond your knowledge, it is best to consult an expert for assistance.
In addition to a faulty oxygen sensor, the "anti-pollution fault" message on a Peugeot 206 could also be caused by issues with the ignition system, fuel injection system, emission system, or other engine components. It is important to check for error codes and seek professional help if the problem persists or is unclear.
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Faulty spark plugs
The "Anti-Pollution Fault" message on a Peugeot 206 indicates a potential problem with the vehicle's emission control system. This generic error is associated with many issues, and only the actual codes will reveal the specific problem. One user with a Peugeot 206 reported that the issue was caused by a battery that was starting to fail.
Another user with a Peugeot 207 GTi 175bhp model reported that their spark plug was killed due to the fault. They replaced the spark plug, and the car ran fine for a week before displaying the "when cold" message and experiencing idle issues. This suggests that the fault may have caused damage to the spark plug, requiring replacement for the issue to be fully resolved.
In addition to spark plugs, other potential causes of the "Anti-Pollution Fault" include faulty sensors, clogged filters, and exhaust problems. It is important to address the underlying cause promptly to prevent increased emissions, reduced fuel efficiency, and potential damage to the engine or emissions control components.
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Incorrect fuel/air ratio
The "anti-pollution fault" is a generic error message that can be associated with many issues. In the Peugeot 207 (and the 207cc), this fault is often caused by the ECU or the head gasket. In the 1.4 or 1.6 VTI models without a turbo, an incorrect fuel/air ratio can cause the engine to misfire, triggering the anti-pollution fault.
Low-quality or incorrect fuel types can trigger incorrect fuel/air ratios, leading to EMS anti-pollution faults. Faulty spark plugs can also cause incomplete combustion and increased emissions, resulting in an incorrect fuel/air ratio.
Blocked or damaged components in the exhaust system, such as the catalytic converter, DPF, or EGR valve, can hinder exhaust flow and disrupt the fuel/air ratio. Malfunctioning air sensors or a dirty air filter can also cause higher emissions and an incorrect fuel/air ratio.
To diagnose the specific issue causing the anti-pollution fault, it is necessary to check the actual error codes using a code reader or an ELM307 scanner. These codes will help identify the root cause and point in the right direction for repairs.
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Frequently asked questions
The "anti-pollution fault" message indicates a problem with your Peugeot's emission control system. This could be due to a malfunctioning sensor, a clogged catalytic converter, or an issue with the exhaust system.
Symptoms of an anti-pollution fault include reduced engine performance, higher fuel consumption, unusual exhaust emissions, and warning lights on the dashboard.
It is important to address the "anti-pollution fault" as soon as possible to avoid further complications and potential damage to your engine. Take your car to a qualified technician for inspection to identify the specific issue causing the fault.
