C1234

Speed Wheel RF Input Signal Missing

DTC C1234, sometimes indicated as C123400 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle chassis.

  • C1234: Speed Wheel RF Input Signal Missing
  • C1234 00: Left Rear Wheel Speed Sensor Circuit Low Input Malfunction

See Also: Related Error Codes
DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • T-SB-0012-18 - ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC)
    TOYOTA: Tsb: some 2001 ? 2002 model year sequoia vehicles may exhibit intermittent vsc activation. After the activation, diagnostic trouble code (dtc) C1234 is stored in the skid control electronic control unit (ecu) memory. Follow the repair proce
  • T-SB-0012-18 - BRAKES (PWS)
    TOYOTA: Tsb: some 2001 ? 2002 model year sequoia vehicles may exhibit intermittent vsc activation. After the activation, diagnostic trouble code (dtc) C1234 is stored in the skid control electronic control unit (ecu) memory. Follow the repair proce
  • 0400107 - SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT
    MAZDA: Abs warning light on with dtc C1141, C1142, C1233, or C1234/grinding noise from the front wheels. *kb
  • 3853 - SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR
    CHEVROLET: Abs lamp on and current or history dtcs C1223, C1224, C1227, C1228, C1234, and/or C1235. *tt
  • 3583 - SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR
    CHEVROLET: Abs lamp on and current or history dtcs C1233, C1224, C1227, C1228, C1234, and/or C1235. *tt
  • 18347 - ELECTRICAL SYSTEM
    FORD: Abs dtc C1233 and C1234 reversed in abs module. *eh
  • 16437 - ELECTRICAL SYSTEM
    FORD: Diagnostic trouble code (dtc) C1233 & C1234 - replace anti-lock brake system euc. *mj
  • 00403 - SERVICE BRAKES, HYDRAULIC
    TOYOTA: Diagnostic trouble code (dtc) C1234 - yaw rate sensor. *tt
  • 17132 - SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE
    FORD: Anti-lock braking system (abs) diagnostic trouble code (dtc) C1233 and C1234 reversed in abs module. *tt
  • 15859 - SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
    FORD: Some vehicles with 4wabs may exhibit diagnostic trouble codes C1233 and C1234 (anti-lock brake sensor output failure). *tt
  • 15813 - SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
    FORD: Some vehicles equipped with 4wabs may exhibit diagnostic trouble codes C1233 and C1234 (anti-lock brake sensor output failure). *tt
  • 16021 - SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
    FORD: Some vehicles with 4wabs may exhibit diagnostic trouble codes C1233 and C1234 (anti-lock brake sensor output failures) in slippery conditions. *tt
  • 13869 - SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT
    FORD: Some vehicles may exhibit a yellow four wheel anti-lock brake (4wabs) lamp on with on eor more diagnostic trouble code C1145, C1234, C1155, C1233, C1165, C1235, C1175, C1236, or a false activation of the 4wabs. *tt
  • 13869 - SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT
    FORD: Some vehicles may exhibit a yellow four wheel anti-lock brake (4wabs) lamp on with one or more diagnostic trouble codes C1145, C1234, C1155, C1233, C1165, C1235, C1175, C1236, or a false activation of the 4wabs. *tt
  • 8137 - SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT
    FORD: Some vehicles may exhibit a yellow four wheel anti-lock brake (4wabs) lamp on with one or more of the followig diagnostic trouble codes C1145, C1234, C1233, C1265, C1235, C1175, C1236, or a flase activation of the 4wabs. *tt
Consumer Complaints for this DTC



2005 FORD ESCAPE with 90000.0 miles

In aug 2012 we were on our way back from a vacation and our abs light came on, along with a flashing 4x4 light. We had no idea what it was or what to do. The vehicle drove fine and stopped fine, except for a couple of times it felt as if the abs engaged on dry cement. We stopped to eat and shop for a few hours and the lights were off when we got back in the vehicle. They didn't come on again until a few days ago (jan 2013). However, i had been complaining to my husband recently that the brakes didn't seem to work right. I hit ice and the abs didn't engage ..No light either..But the grinding sound once in awhile was still there. So we took it in and put it on the computer to diagnose the problem. Came back with 2 codes U2023 and C1234. Which means the right front tone ring is bad. After searching the internet, i found this to be a very common problem. Also got under the truck and sure enough the tone ring is cracked and spinning around loosely. The safety issue here is the abs will lock up randomly on dry cement when you start to apply your brakes. Which then you can't completely control your vehicles direction and if you take your foot off the break to control your vehicle, then you may hit someone or something. I am thankful for all the info i have found so when it gets repaired they can't screw me over.
SERVICE BRAKES,



2003 FORD WINDSTAR with 76000.0 miles

Abs and brake warning light come on instrument panel intermittently. Abs diagnostic trouble codes are as follows: C1234; C1235; C1236; C1185; U1260; C1446 auto mechanic states that is common problem with Ford abs control module (brake ecu). Ford bulletin on C1185 code states faulty solder connections cause printed circuit board failure. Dealer wants approximately $2000 to complete repair.
SERVICE BRAKES, HYDRAULIC,



2003 FORD WINDSTAR with 200000. miles

On my 2003 Windstar i have been having problems with the abs for quite some time don't know the exact time that it first happened its been a few years. The abs lights come on and shut off periodically. As of today the check engine light came on and the abs and brake lights came on. And the cigarette lighter fuse keeps blowing i went to get the codes read and the fuse was blown so i changed it and it blew right away again so put in one more so the codes could be read. It came up with 18 codes from just one day they are C1145, C1234, C1185, C1198, C1194, C1254, C1246, C1250,C1242, C1214, C1210, C1446 ,U1262, B1318 all having to do with the abs they could tell me exactlly what was going on and told me to google it. Also codes P0171, P0174. *js
SERVICE BRAKES,



2002 TOYOTA SEQUOIA

When driving at 70mph or higher a light comes on at the dash board vsc trac off the car loses speed and veers right to left almost loosing control of the steering wheel a diagnostic gave me a code C1234 wich is related with the stability control system yaw rate sensor / computer recalibration. This sensor is supposed to last the life of the car.
ELECTRONIC STABILITY CONTROL, STEERING SERVICE BRAKES



2001 TOYOTA SEQUOIA with 100000. miles

Started with both vsc and trac lights on. In both warm and colder temperatures, the car abs engages. Feels like driving over gravel. Car pulls to one side or another, and braking seems almost impossible. This became more and more common. It started once every couple of months, to almost every trip. Toyota read codes and stated that it was yaw rate sensor that needed to be replaced. Over a cost of $1800. We changes it and the car acted normally for 1 day. A day later the lights came back on and the skidding occurred again. Even after replacing the yaw rate sensor and performing a 0-point calibration, they read the codes, and showed the following: C0371 yaw rate sensor output signal malfunction C1208 steering position sensor output signal malfunction C1234 malfunction in yaw rate sensor C1271 low output voltage of right front speed sensor C1272 low output voltage of left front speed sensor C1273 low output voltage of right rear speed sensor C1274 low output voltage of left rear speed sensor C1275 abnormal change in output voltage of right front speed sensor C1276 abnormal change in output voltage of left front speed sensor C1277 abnormal change in output voltage of right rear speed sensor C1278 abnormal change in output voltage of left rear speed sensor C1279 deceleration sensor is faulty C1281 master cylinder pressure sensor output signal is faulty they estimated that the cost of repairing all of these sensors was approx $4500. The likelihood that all of these sensors gave out at the same time, to me is highly unlikely. There has been numerous complaints about this car's braking system and this seems to be an exploit of yet another shortcoming of this car. Currently if the car sits idling for more than 10 mins, the vsc and trac lights come on regardless of temperature outside.
ELECTRONIC STABILITY CONTROL, SERVICE BRAKES



2001 TOYOTA SEQUOIA with 142996. miles

While driving down the road about 30-45 mph the vehicle suddenly jerked to the left as if someone else turned the steering wheel. If i hadn't moved fast it would have been a major accident in the neighboring lane. There was a beep at the same time and the trac light and vsc trac light went on. Upon further testing the yaw rate sensor had a fail code of C1234 and the code C1363 booster pedal force switch vault was also affected. Our yaw rate sensor needed replacing. I hear a recall is in the works for this. If ao i want a refund please. It was very scary and dangerous.
ELECTRONIC STABILITY CONTROL,



2001 TOYOTA SEQUOIA with 48700.0 miles

2001 Toyota Sequoia- 48k miles..Vehicles traction control and vsc lights come on shortly after driving the car. Just before the lights come on, the car shakes and makes a grinding noise, pulls to the right, and loses power. This occurs every time you drive the car. Anywhere from 1min to 15min from the start of driving. It is very dangerous once the vehicle is up to speed, we have almost gotten in to an accident because the car pulled so violently and didn't have power. The car will shake and pull and the only way we've gotten it to stop is by stepping on the brake and reducing speed (less than 30 mph). After we reduce the speed, the trac and vsc lights come on and the car is drivable until you cycle the ignition. It's pretty scary. My father-in-law took the car to a Toyota dealership and their diagnosis is skid control ecu faulty, must replace. Dtc codes C1363 and C1234. The cost they quoted him was $2415.99 + $200 labor. We haven't decided to purchase the new ecu because we feel its something that should be covered under a warranty or should be a tsb. I've since searched the internet and found that other Sequoia owners have the same problem and Toyota's response is to just replace the ecu. Some of them even got into accidents due to the sudden loss of power and shaking.
VEHICLE SPEED CONTROL, ELECTRONIC STABILITY CONTROL POWER TRAIN

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