The Lemon IndexOn Hyundai and Kia engines, the knock sensor detection system picked up vibration that can point to wearing connecting rod bearings. Full P1326 page
53 owner complaints · the #1 code Hyundai Tucson owners name · 44% of Hyundai Tucson complaints that name a code (every car: 2.6%)
2012–2021 Hyundai Tucson · most: 2019 (11), 2017 (10), 2016 (8)
Hyundai Tucson owners named P1326 in 53 complaints to the U.S. government (NHTSA), most often on the 2019, 2017 and 2016 model years. The part they name most is the knock sensor (15 complaints). Complaints are owner reports, not proof of a defect.
Hyundai Tucson model years that report P1326
Owner complaints naming P1326, by model year. Raw counts: years that sold more get more complaints, so this is each model year's record, not a failure rate.
What owners say caused it or fixed it
The most-named part is the knock sensor, in 15 of the 53 complaints (28%). 12 of those mention it being replaced or repaired, and 5 say the problem came back afterwards. Next: engine (replaced or rebuilt) (8), catalytic converter (8) and wiring or a connector (5).
- Knock sensor15 complaints12 mention a repair or replacement, 5 of them say the problem came back
- Engine replaced or rebuilt8 complaints8 mention a repair or replacement, 3 of them say the problem came back · what Hyundai Tucson owners paid
- Catalytic converter8 complaints7 mention a repair or replacement, 4 of them say the problem came back · what Hyundai Tucson owners paid
- Wiring or a connector5 complaintsnamed as the cause, no repair mentioned
- Spark plugs3 complaints3 mention a repair or replacement, 2 of them say the problem came back · what owners paid
- Engine computer (ECM / PCM)3 complaints2 mention a repair or replacement, 1 of them says the problem came back · what owners paid
16 complaints mention a recall and 17 mention a warranty.
Counted from the owners' own words: a part counts when a sentence names it with a cause or repair word. What owners wrote, not a diagnosis. A shop should confirm the cause before replacing parts.
Symptoms owners describe with P1326
57% of these complaints say the check engine light came on.
- Rattles or knocks58%31 of 53 complaints
- Loses power or goes into limp mode43%23 of 53 complaints
- Flashing check engine light42%22 of 53 complaints
- Stalls or shuts off17%9 of 53 complaints
- Uses or leaks oil13%7 of 53 complaints
- Shakes, runs rough or misfires9%5 of 53 complaints
Share of the complaints naming P1326 whose text also describes each problem. A complaint can describe more than one.
Codes owners report with it
P000B 2
Other codes named in the same Hyundai Tucson complaints, and in how many.
Repair costs
Hyundai Tucson engine replacement cost · Hyundai Tucson catalytic converter replacement cost
Recalls on these Hyundai Tucson years
- Engine · 2017 · issued 2021
The connecting rod bearings inside the engine may wear prematurely, which can result in engine damage. NHTSA 21V727000 - Engine · 2012 · issued 2019
The engine oil pan may leak and, if not addressed, the loss of oil may result in engine damage. NHTSA 19V063000
2 recalls for the same systems (engine) on the Hyundai Tucson model years above. A recall for the same system isn't proof it's behind P1326. Recall work is free at any dealer: check a VIN at nhtsa.gov/recalls or with our VIN check.
Keep going
- P1326: meaning, causes and every car that reports it
- Hyundai Tucson reliability by year
- 2019 Hyundai Tucson problems and recalls
Other codes Hyundai Tucson owners report
P1326 on other cars
Kia Optima (92) · Hyundai Sonata (90) · Hyundai Santa Fe (52) · Kia Soul (38) · Kia Sorento (31) · Kia Sportage (22) · Kia Forte (10)
The details
How we count
We read every owner complaint in the NHTSA file whose text names this trouble code, and count the ones filed about this model (matched by the make, model and model year on the complaint). Mileage is what the owner entered on the form.
Parts: a complaint counts for a part when one of the owner's own sentences names that part together with a cause word (failed, bad, diagnosed, caused by, leaking ...) or a repair word (replaced, repaired, new, reprogrammed ...). "Came back" means the same complaint also says the problem returned or the repair didn't fix it. These are counts of what owners wrote, not a diagnosis, and one complaint can name several parts.
Complaints are reports, not proof of a defect, and most owners never file one. Popular models get more complaints, so the counts are not a failure rate. The code meaning is the standard SAE J2012 definition in our own words, or the carmaker's meaning where we verified it for that make.
What P1326 means
On Hyundai and Kia engines, the knock sensor detection system picked up vibration that can point to wearing connecting rod bearings. The car may go into limp mode. Owners are usually told to see a dealer, because this system was added during the brands' engine bearing campaigns.
Stop and fix now. Don't put it off. This can affect safety, stall the car or cause expensive damage.
- Early connecting rod bearing wear
- Faulty knock sensor or wiring
- Software (KSDS update)
Check the complaints yourself
NHTSA complaint numbers (search them at nhtsa.gov): 11777335, 11771149, 11769530, 11763199, 11756421, 11753637, 11753365, 11751791, 11751238, 11744527, 11743306, 11735611 and 41 more.
Quick answers
What does P1326 mean on a Hyundai Tucson?
Knock Sensor Detection System (KSDS). On Hyundai and Kia engines, the knock sensor detection system picked up vibration that can point to wearing connecting rod bearings. The car may go into limp mode. Owners are usually told to see a dealer, because this system was added during the brands' engine bearing campaigns.
Which Hyundai Tucson years have the most P1326 complaints?
In complaints to NHTSA, owners of the 2019 (11), 2017 (10), 2016 (8) Hyundai Tucson named P1326 most (53 complaints in all, 2012–2021). Raw counts, not a failure rate.
What fixes P1326 on a Hyundai Tucson?
Owners most often name the knock sensor (15 of 53 complaints), then engine (replaced or rebuilt) and catalytic converter. That's what owners wrote, not a diagnosis: have a shop confirm the cause with a scan and tests before replacing parts.
Can I drive my Hyundai Tucson with P1326?
Stop and fix now. Don't put it off. This can affect safety, stall the car or cause expensive damage.
Sources: NHTSA owner complaints that name P1326 on the Hyundai Tucson, counted by The Lemon Index; NHTSA recalls; repair bills owners named. Meanings: SAE J2012 in our own words. Owner reports, not a diagnosis or repair advice for your car.