B0188 code meaning
Rear Wiper Motor Circuit
What B0188 means
B0188 cannot be traced: it appears in no publicly available J2012 list and in no public carmaker material. The rear wiper meaning repeats B0910, titled Wiper Motor Rear Circuit. Bosch describes the part: unlike the front system, the rear wiper has a single arm driven straight off the motor, with sweep angles from 88 to 177 degrees and wiped radii of 250 to 500 mm. Because motor and harness sit in the tailgate, the circuit must cope with hinge flexing and moisture. Audi traced dead or intermittent rear wipers on the 2010–2015 Q5 to corrosion at splice B538 in the motor control circuit; the voltage drop pushed the control signal out of range, and the splice was repaired. With the circuit open or shorted, the rear window stays unwiped.
B0188 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0188
- Rear wiper does not move or works only now and then
- Rear wiper stops away from its rest position
Common causes of B0188
- Most likelyWires broken in the rubber trunk between body and tailgate after years of opening
- PossibleCorroded splice or connector in the rear wiper control circuit causing a voltage drop
- PossibleRear wiper motor seized, for example from a corroded spindle, or internally shorted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Rear wiper motorBody control moduleTailgate harness
What each part of B0188 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 88 | The exact fault in that area. |
What to do next
- Note B0188 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0188
What does B0188 mean?
B0188 means "Rear Wiper Motor Circuit". B0188 cannot be traced: it appears in no publicly available J2012 list and in no public carmaker material. It is a generic code, so it means the same on every make.
Is it safe to drive with B0188?
B0188 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0188 fail an emissions test?
B0188 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0188 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0188 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.