C1252 on Lexus
Hybrid brake booster or actuator fault (Toyota, Lexus) or vacuum pump control circuit (Chrysler, Jeep, Ram)
Severity: Inspect soon
Toyota bulletins tie C1252 to the brake, ABS or TRAC lights, and Toyota says to have the car inspected immediately when the ABS light is on; FCA ties it to the ESC light, which FCA says needs a dealer as soon as possible.
It gets more serious if:
- Stop: Stop in a safe place and call a dealer if the red brake warning light is on or the brake pedal feels different.
- Stop: On a Chrysler, Jeep or Ram, stop and have it checked immediately if the red brake warning light comes on.
This page covers only what differs on Lexus. For what C1252 means, the ranked causes and the test order, see the C1252 guide.
What's different on Lexus
LexusYour car
2011–2017 · CT
Supported by vehicle dataLexus bulletins cover the 2011–2014 CT 200h (brake booster with master cylinder) and 2014–2017 CT 200h (brake actuator). The bulletins are on NHTSA, but whether they are still current is not verified, so it is labelled vehicle data rather than confirmed.
Where it is:Brake booster with master cylinder or brake actuator
L-SB-0009-21Status unverified
Brake, ABS and/or TRAC lights or Check VSC with C1391, C1252, C1253 or C1256
2011–2014ct · issued · NHTSA 10198130
2011–2014 CT 200h. Repair procedure for a small internal brake fluid leak inside the brake booster assembly with master cylinder. Only the NHTSA flat-file summary was reviewed, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
LSB000824Status unverified
Brake, ABS and/or TRAC lights or Check VSC with C1391, C1252, C1253 or C1256
2014–2017ct · issued · NHTSA 10252263
2014–2017 CT 200h. Repair procedure for a small internal brake fluid leak inside the brake actuator. Only the NHTSA flat-file summary was reviewed, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Sources and review
- Lexus L-SB-0009-21: brake, ABS, TRAC lights or Check VSC with C1391/C1252/C1253/C1256 (CT 200h)
- Lexus LSB000824: brake, ABS, TRAC lights or Check VSC with C1391/C1252/C1253/C1256 (CT 200h)
- Toyota Camry Owner's Manual (OM06291U)
- Toyota T-SB-0024-19: brake, ABS, TRAC lights or Check VSC with C1391/C1252/C1253/C1256 (Prius, Prius Plug-in)
- Toyota T-SB-0032-16: brake, ABS, TRAC lights or Check VSC with C1391/C1252/C1253/C1256 (Prius, Highlander HV)
- FCA S1805000006: ESC light on, C1252-92 vacuum pump control circuit and/or P258B electronic vacuum pump performance
- 2022 Ram 2500/3500 Owner's Manual: ESC Activation/Malfunction Indicator Light
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error