The Lemon IndexThe computer can't read the bank 1 camshaft position sensor.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Failed cam sensor. Then: wiring or connector fault; timing problem.
Owners named P0340 in 79 complaints to the U.S. government, most often on the Nissan Altima.
Cars owners report it on
Complaints that name P0340, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2003 Nissan Maxima · 2003 Nissan Murano · 2003 Nissan 350Z · 2003 Nissan Altima · 2006 Nissan Altima · 2013 Mercedes-Benz C-Class
The details
What P0340 means
The computer can't read the bank 1 camshaft position sensor. Expect hard starting, stalling or a rough run.
Can I drive with P0340?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
51% of the owner complaints that name P0340 also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0340
- Failed cam sensor
- Wiring or connector fault
- Timing problem
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Stalls or shuts off: 51% of complaints
- Loses power or goes into limp mode: 16% of complaints
- Warning lights and electrical faults: 15% of complaints
- Won't start or hard to start: 13% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P0340 most
2003 Nissan Maxima (5), 2003 Nissan Murano (5), 2003 Nissan 350Z (4), 2003 Nissan Altima (2), 2006 Nissan Altima (2), 2013 Mercedes-Benz C-Class (2).
Related codes
P0341 P0344 P0345 P0339 P0336 P0335 P0351 P0352
Quick answers
What does P0340 mean?
Camshaft Position Sensor A Circuit (Bank 1). The computer can't read the bank 1 camshaft position sensor. Expect hard starting, stalling or a rough run.
Can I drive with P0340?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
What causes P0340?
Failed cam sensor; Wiring or connector fault; Timing problem.
Counts: NHTSA owner complaints whose text names P0340. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.