Engine-Codes - Ram - B1291 RAM

B1291 RAM - Park Assist Sensor 4

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

B1291 RAM Possible Causes

  • Faulty Park Assist Sensor 4
  • Park Assist Sensor 4 harness is open or shorted
  • Park Assist Sensor 4 circuit poor electrical connection
  • Faulty Park Assist Module

How do I fix code B1291 RAM

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

B1291-11 PTS SENSOR 4 CIRCUIT SHORT TO GROUND
B1291-12 PTS SENSOR 4 CIRCUIT SHORT TO BATTERY
B1291-25 PTS SENSOR 4 SIGNAL SHAPE / WAVEFORM FAILURE
B1291-92 PTS SENSOR 4 PERFORMANCE OR INCORRECT OPERATION

Cost of diagnosing the B1291 RAM code

Labor: 1.0

The cost of diagnosing the B1291 RAM code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1291 RAM Meaning

The Park Assist Sensors (PTS) are ultrasonic transceivers that are completely controlled by the Park Assist Module. The sensors transmit and receive ultrasonic signals. Each sensor has a voltage, signal, and return the circuit to the module. The sensors communicate with the Park Assist Module using a dedicated serial bus communication circuit. The Park Assist Module monitors the PTS Sensor when the vehicle in reverse and during the self-test while the vehicle is in drive between 18 km/h (11 mph) and 40 km/h (25 mph). The Park Assist Module sets the OBDII code when the Park Assist Sensor Signal circuit is not to factory specifications.

B1291 RAM More Information

Need more information on how to fix the B1291 RAM code?
Get Access to Factory Service Manuals

Need more help?

Get the B1291 Ram code diagnosed by a professional: Find a repair shop in your area