P0327 means the ECU detected a voltage signal from knock sensor 1 (or the single knock sensor on inline-4 engines) that is below the expected range. The knock sensor is a piezo-electric device bolted to the engine block that listens for the high-frequency vibration of detonation. A low input typically points to a failed sensor, damaged wiring, or a poor electrical connection.
DTC/P0327·Toyota
P0327 on Toyota: Causes, Symptoms and Fix Cost
Quick Answer
Moderate SeveritySafe to drive (short-term)Toyota
P0327 on a Toyota means the ECU detected a voltage signal from knock sensor 1 (or the single knock sensor on inline-4 engines) that is below the expected range. The knock sensor is a piezo-electric device bolted to the engine block that listens for the high-frequency vibration of detonation. A low input typically points to a failed sensor, damaged wiring, or a poor electrical connection.
Repair cost on Toyota€60 - €700
What does P0327 mean on a Toyota?
Toyota Camry
2007–2024The 2GR-FE V6 (2007 to 2017 Camry) has knock sensors mounted in the valley between the cylinder banks at the rear of the engine. The intake manifold must be removed for access, and the typical labour is 3 to 5 hours at 50 to 80 EUR per hour in the EU. Always replace both knock sensors together on the 2GR-FE. The 2AR-FE inline-4 (2010+ 4-cylinder Camry) has the sensor on the side of the block and is far cheaper to service.
What causes P0327 on a Toyota?
Beyond the generic causes listed on the main P0327 page, these are the Toyota-specific patterns we see most often:
Toyota Camry2GR-FE V6 knock sensors at rear of engine under intake (expensive)
Toyota Camry2AR-FE inline-4 sensor wiring fatigue (cheaper repair)
How to diagnose P0327 on a Toyota with OBD2
Follow these steps to pinpoint the root cause of P0327:
- Locate knock sensor 1. On inline-4 engines it is bolted to the engine block, typically on the intake side. On V6 and V8 engines, knock sensors often sit in the valley under the intake manifold, which makes access expensive
- Inspect the connector for corrosion or damage. Disconnect, clean with electrical contact cleaner, and reseat. Clear the code and drive several cycles to see if it returns
- Measure sensor resistance with a multimeter. Most knock sensors read 4 to 5 megohms at room temperature. A reading near zero or infinity indicates a failed sensor
- Inspect the wiring from the sensor back to the ECU connector. Look for chafing, rodent damage, or breaks. The wire is a shielded twisted pair on most modern designs
- If the sensor and wiring are good, verify mounting torque. Knock sensors are torque-sensitive (typically 20 to 25 Nm). Loose or over-tight mounting alters the sensor signal and can trigger P0327
How much does P0327 cost to fix on a Toyota? (EUR)
Estimated repair costs on a Toyota (Toyota costs align with the average for this code across makes).
Prices estimated as of May 2026. Costs vary by region, vehicle, and shop.
Related codes that often appear with P0327 on Toyota
These codes commonly cluster with P0327 on Toyota vehicles:
FAQ: P0327 on Toyota
Can I drive with a knock sensor code?
Short distances yes, but not long-term. The ECU pulls ignition timing as a safety measure when it cannot trust the knock sensor signal, costing you 5 to 15 percent fuel economy and noticeable power. More importantly, the ECU has no way to detect actual detonation. Sustained heavy load can damage pistons over weeks or months.
Why is the knock sensor so expensive to replace on a V6 or V8?
On most V6 and V8 engines, knock sensors are mounted in the valley between the cylinder banks, under the intake manifold. The intake must come off to access them. On engines like the Toyota 2GR-FE V6, this is a 3 to 5 hour job with labour around 250 to 400 EUR even though the sensor itself is only 40 to 80 EUR. The sensors are typically replaced as a pair while the intake is off.
What is the difference between P0327 and P0328?
Both refer to knock sensor 1 (or the single sensor). P0327 is low input (signal voltage too low) while P0328 is high input (signal voltage too high). Both typically indicate sensor failure or wiring issues, but P0327 is more often a failed sensor and P0328 is more often a shorted wire.
Can a recent intake manifold service cause P0327?
Yes. If the intake manifold was removed for cleaning, gasket replacement, or fuel injector service, the knock sensor bolts may not have been torqued to the correct spec (typically 20 to 25 Nm). Loose or over-tight mounting changes the sensor's resonance and the ECU can flag it as an out-of-range signal. Ask the shop to recheck torque before replacing the sensor.
Looking for the full P0327 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P0327 guideSkanyx · Toyota
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