The Lemon IndexOn Toyota and Lexus models with a powered brake booster (mostly hybrids), the brake computer saw the stored brake pressure falling faster than it should, which points to an internal leak. Full C1391 page
20 owner complaints · the #1 code Toyota Camry owners name · 20% of Toyota Camry complaints that name a code (every car: 2.4%)
Middle of 100,000 miles · most between 92,000 and 125,000 (16 owners gave it)
Toyota Camry owners named C1391 in 20 complaints to the U.S. government (NHTSA), most often on the 2007, 2008 and 2014 model years, at a middle of 100,000 miles. The part they name most is the ABS module, pump or accumulator (12 complaints). Complaints are owner reports, not proof of a defect.
Toyota Camry model years that report C1391
Owner complaints naming C1391, by model year. Raw counts: years that sold more get more complaints, so this is each model year's record, not a failure rate.
Mileage when it happened
100,000 miles is the middle of what 16 owners entered. Half were between 92,000 and 125,000 miles.
The mileage on the complaint form, when the owner gave one.
What owners say caused it or fixed it
The most-named part is the ABS module, pump or accumulator, in 12 of the 20 complaints (60%). 5 of those mention it being replaced or repaired. Next: engine software (a reflash) (2).
- ABS module, pump or brake accumulator12 complaints5 mention a repair or replacement · what Toyota Camry owners paid
- Software update (reflash)2 complaints2 mention a repair or replacement
10 complaints mention a recall and 8 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 C1391
5% of these complaints say the check engine light came on.
- Brakes or ABS act up95%19 of 20 complaints
- Warning lights and electrical faults35%7 of 20 complaints
Share of the complaints naming C1391 whose text also describes each problem. A complaint can describe more than one.
Codes owners report with it
C1256 2
Other codes named in the same Toyota Camry complaints, and in how many.
Repair costs
Toyota Camry ABS module replacement cost
Recalls on these Toyota Camry years
- Speed control · 2007, 2008, 2009 · issued 2010
TOYOTA IS RECALLING CERTAIN MODEL YEAR 2005-2010 AVALON, MODEL YEAR 2007-2010 CAMRY, MODEL YEAR 2009-2010 COROLLA, COROLLA MATRIX, RAV4, MODEL YEAR 2010 HIGHLANDER, MODEL YEAR 2008-2010 SEQUOIA, AND MODEL YEAR 2007-2010 … NHTSA 10V017000 - Speed control · 2007, 2008, 2009 · issued 2009
TOYOTA IS RECALLING CERTAIN MODEL YEAR 2004-2010 PASSENGER VEHICLES. NHTSA 09V388000
2 recalls for the same systems (brakes and speed) on the Toyota Camry model years above. A recall for the same system isn't proof it's behind C1391. Recall work is free at any dealer: check a VIN at nhtsa.gov/recalls or with our VIN check.
Keep going
- C1391: meaning, causes and every car that reports it
- Toyota Camry reliability by year
- 2007 Toyota Camry problems and recalls
C1391 on other cars
Toyota Prius (210) · Toyota Highlander (49)
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 C1391 means
On Toyota and Lexus models with a powered brake booster (mostly hybrids), the brake computer saw the stored brake pressure falling faster than it should, which points to an internal leak. Braking assist can be affected, so get it checked before driving much.
Stop and fix now. Don't put it off. This can affect safety, stall the car or cause expensive damage.
- Internal leak in the brake booster/accumulator assembly
- Leaking seals in the brake actuator
Check the complaints yourself
NHTSA complaint numbers (search them at nhtsa.gov): 11659073, 11555807, 11445079, 11256517, 11115345, 11115339, 11102820, 11034087, 10919723, 10599064, 10599061, 10566608 and 8 more.
Quick answers
What does C1391 mean on a Toyota Camry?
Abnormal Leak in Brake Accumulator. On Toyota and Lexus models with a powered brake booster (mostly hybrids), the brake computer saw the stored brake pressure falling faster than it should, which points to an internal leak. Braking assist can be affected, so get it checked before driving much.
Which Toyota Camry years have the most C1391 complaints?
In complaints to NHTSA, owners of the 2007 (16), 2008 (2), 2014 (1) Toyota Camry named C1391 most (20 complaints in all, 2007–2014). Raw counts, not a failure rate.
What fixes C1391 on a Toyota Camry?
Owners most often name the ABS module, pump or accumulator (12 of 20 complaints), then engine software (a reflash). That's what owners wrote, not a diagnosis: have a shop confirm the cause with a scan and tests before replacing parts.
At what mileage does C1391 show up on a Toyota Camry?
Owners who gave their mileage reported a middle of 100,000 miles; half were between 92,000 and 125,000 (16 owners).
Can I drive my Toyota Camry with C1391?
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 C1391 on the Toyota Camry, 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.