The Quick Answer above is the generic definition. What follows is the model-specific detail for the Volkswagen models that log P0407.
DTC/P0407·Volkswagen
P0407 on Volkswagen: Causes, Symptoms and Fix Cost
Quick Answer
Moderate SeveritySafe to drive (short-term)Volkswagen
P0407 on a Volkswagen means EGR position sensor 'B' is sending a voltage below its normal operating range. Sensor B only exists on engines with a second EGR valve or a second EGR circuit, for example diesels that combine high-pressure and low-pressure EGR, and the manufacturer decides which of the two is called B. The fault is usually wiring or a failed sensor pulling the signal to ground.
Typical repair cost, all makes€70 - €730
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Volkswagen Golf
2013-2024The EA288 TDI in the Golf 7 and later uses two EGR circuits: a conventional high-pressure EGR valve and a low-pressure EGR system that takes exhaust gas after the particulate filter. Each has its own valve and position feedback, so a sensor B code is possible on this four-cylinder diesel. Read the fault with manufacturer-level software (VCDS or ODIS), which names the valve concerned, before ordering parts, and have the EGR adaptation carried out afterwards.
What causes P0407 on a Volkswagen?
Beyond the generic causes listed on the main P0407 page, these are the patterns noted for Volkswagen models:
Volkswagen GolfChafed or corroded wiring to the second EGR valve pulling the signal voltage low
Volkswagen GolfFailed position sensor in the second EGR valve
How to diagnose P0407 on a Volkswagen with OBD2
Follow these steps to pinpoint the root cause of P0407:
- Identify which physical valve or sensor is 'B' in the manufacturer's service data. On engines with high- and low-pressure EGR it belongs to one of the two circuits, and manufacturer-level software names it directly
- Back-probe the sensor B signal wire. A healthy sensor at rest reads 0.5-1.0V. Below 0.2V indicates short to ground
- Verify 5V reference and ground at sensor B connector. If 5V reference is missing, check whether sensor A is also affected
- Inspect the harness branch for sensor B for chafing against hot exhaust parts or heat shields
- Replace sensor B (or the integrated valve assembly) if wiring tests good and signal reads steadily low
How much does P0407 cost to fix on a Volkswagen? (EUR)
Estimated repair costs for P0407 in EUR, compiled across makes. Expect Volkswagen parts and labour towards the upper end of each range.
Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.
Codes related to P0407
These codes are often seen alongside P0407 or point to related issues, on any make:
Looking for the full P0407 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P0407 guideSkanyx · Volkswagen
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