B1629
Low Severity (Level 2)PRNDL Reverse Input Short To Battery
B1629 usually means pRNDL Reverse Input Short To Battery.
Can you still drive with B1629?
⚠️Short-distance driving is usually OK, but have this diagnosed within a week to prevent further damage.
Typical repair cost: $60 – $700
Severity Level 2 — Low
This code indicates a minor issue that is unlikely to cause immediate driveability problems. You can typically continue driving but should have the vehicle inspected at your earliest convenience.
Common Symptoms
- Body electronics staying on or functioning when they shouldn't (powered continuously)
- Body electronics not responding to controls — stuck in one state
- Battery draining overnight or when vehicle is parked
- Excessive current draw on the body electrical system circuit (fuse may blow repeatedly)
Possible Causes
- Damaged wiring in the body electrical system harness shorted to a 12V power source — wiring insulation chafed through from rubbing against metal body panels
- Water intrusion or corrosion in body electrical system electrical connector causing internal short to battery voltage
- Failed body control module (BCM) or sensor — internal short to power within the component
- Aftermarket accessory installation tapped into the wrong circuit, back-feeding 12V
Common Fixes
- Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($11-89 at shop, free at auto parts store for basic scan)
- Visually inspect the body electrical system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $135 diagnostic fee at shop)
- Repair or replace damaged section of wiring harness where short is located — solder and heat-shrink all connections, don't use crimp connectors on critical circuits ($93-254 depending on accessibility)
- If body control module (BCM) or sensor is internally shorted, replace with a quality OEM or OEM-equivalent aftermarket unit ($50-600)
- Clean all ground points related to the body electrical system — remove bolt, sand contact surface to bare metal, apply dielectric grease, and torque to spec ($78-119 at shop)
Estimated Repair Cost
These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.
Frequently Asked Questions
What does B1629 mean?
B1629 stands for "PRNDL Reverse Input Short To Battery". B1629 usually means pRNDL Reverse Input Short To Battery.
Can you drive with B1629?
Short-distance driving is usually OK, but have this diagnosed within a week to prevent further damage.
How much does it cost to fix B1629?
Repair costs for B1629 typically range from $60 to $700, depending on your vehicle make, model, and local labor rates. Common fixes include: Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($11-89 at shop, free at auto parts store for basic scan); Visually inspect the body electrical system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $135 diagnostic fee at shop); Repair or replace damaged section of wiring harness where short is located — solder and heat-shrink all connections, don't use crimp connectors on critical circuits ($93-254 depending on accessibility).
Will B1629 clear itself?
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