Nissan code
P0340: on a Nissan
How much to fix P0340 on a Nissan? Typically $100 to $340 for camshaft position sensor replacement, the most common fix. This is an estimate, not a quote.
P0340 means the engine computer does not see a clean signal from the camshaft sensor. On Nissans, the sensor is cheap but access varies, and the usual bad connector adds to it.
General meaning of P0340: The camshaft position sensor tells the computer which stroke each cylinder is on so it can time the injectors and spark. For this code the signal is missing or garbled. Some cars start and run anyway using the crank sensor alone, while others stall or refuse to start. See the full P0340 page.
Models to know about
| Model | Years | What to know |
|---|---|---|
| Altima | 2007 to 2018 | Cam sensor is on the cylinder head; heat and oil age it. |
| Maxima | 2004 to 2015 | V6 with sensors on each cam. |
| Frontier | 2005 to 2021 | Older 4.0 V6. |
| Murano | 2009 to 2019 | V6. |
Common causes on a Nissan
- Sensor failing from heat.
- Connector corroded or loose.
- Timing chain stretch causing the signal to drift.
- Oil on the sensor from a leaking valve cover.
NHTSA's public complaint file shows how owners describe this kind of trouble: the 2010 Nissan Altima has 381 complaints on file, and 33 of them use wording like camshaft, cam sensor, P0340, stall; the 2012 Nissan Frontier has 80 complaints on file, and 6 of them use wording like camshaft, cam sensor, P0340, stall. Complaints are owner reports, not proof of a cause.
Check this first
- Check the connector for oil and green corrosion.
- Listen for chain rattle on cold start.
- Ask if the sensor was tested or swapped on a guess.
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $35 | $120 |
| Labor: 0.6 to 1.3 hours × $110 to $150 an hour | $66 | $195 |
| Fees: shop supplies, disposal, diagnostics | $0 | $20 |
| Total, rounded | $100 | $340 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in the US, $27.13 an hour, times 4 to 5.5 to cover what a shop bills (overhead, tools, insurance, profit). Parts are a band from budget aftermarket to the manufacturer part. Full method.
Not a repair shop, estimates only. Typical range, estimate. Not a quote. Your car, parts and shop change the number.
The sensor itself is cheap. Labor depends on access and whether the intake needs to come off.
Other repairs that may be involved
| Repair | Typical range, US |
|---|---|
| Camshaft position sensor replacement | $100 to $340 |
| Timing chain replacement | $1,125 to $2,550 |
Questions to ask the shop
- Is it the sensor, wiring or timing?
- Was the connector checked?
- What is the warranty?
Got a quote already? Check it against the range. Wondering if a recall touches this problem? See Nissan recalls by model or check a VIN.
P0340 on a Nissan: questions
Will the car stall?
Sometimes, and it may be hard to start.
Should I tow it?
If it stalls in traffic, avoid driving until it is fixed.
How much does it cost to fix P0340 on a Nissan?
The most common fix, camshaft position sensor replacement, has a typical range of $100 to $340 across the US. That is an estimate built from parts prices and local labor wages, not a quote. Your model, engine and shop move it.
Sources
- NHTSA complaints, 2010 Nissan Altima
- NHTSA complaints, 2012 Nissan Frontier
- NHTSA recall lookup by VIN
Written from public NHTSA data, owner-reported patterns and general repair knowledge, in our own words. Model lists are examples, not a full list, and patterns are not a diagnosis. Prices updated October 2026. Not a repair shop, estimates only.