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B1318 on Chrysler Voyager

Battery Voltage Low

Factory diagnostic protocol and troubleshooting wire for fault code B1318 specifically for the Chrysler Voyager (2020–2026, 3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic)).

Verified OEM Telemetry & Field Repair Tree
Chrysler Voyager2020–2026
Chrysler Voyager
Van3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
Voyager SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Drivable (Short Trip)
Medium urgency level
Est. Repair Cost
$80 - $250 (DIY: $0 - $180)
Parts & Labor DIY
Check B1318 On Another Chrysler Model:
Diagnose B1318 on Specific Voyager Model Year:

1. Symptoms of B1318 on Chrysler Voyager

When the Engine Control Module (ECM/PCM) on your Chrysler Voyager (3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic)) logs fault code B1318, drivers commonly observe:

Battery warning light on dash on Chrysler Voyager (3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic))
Slow engine cranking or rapid clicking starter on Chrysler Voyager (3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic))
Random electrical accessories (radio, power windows) shutting off on Chrysler Voyager (3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic))
Multiple U-codes and B-codes stored simultaneously on Chrysler Voyager (3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic))
Chrysler Voyager OBD-II Port Location
The 16-pin diagnostic connector is located Driver lower kick panel near hood release lever. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Chrysler Voyager

Historical warranty claims and technical repair bulletins for Chrysler Voyager point to the following failure distribution:

55%
Failing 12V automotive battery (sulfated plates or dead cell) (Chrysler OEM Part)
25%
Faulty alternator not charging battery (>13.5V) (Chrysler OEM Part)
12%
Corroded or loose battery cable terminals (Chrysler OEM Part)
8%
Parasitic battery drain drawing power while parked (Chrysler OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Chrysler Voyager.

3. Step-by-Step DIY Repair Guide for Chrysler Voyager

01
Test Battery Open-Circuit Voltage

Measure resting battery voltage with engine off. Normal is 12.6V. If under 12.0V, battery is discharged. on the Chrysler Voyager equipped with 3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic).

Required Tool: Digital Multimeter
02
Clean Battery Posts and Terminals

Remove corrosion with baking soda solution and wire brush, tighten terminal clamps firmly. on the Chrysler Voyager equipped with 3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic).

Required Tool: Terminal Cleaning Brush, 10mm Wrench
03
Test Alternator Charging Voltage

Start engine and measure voltage across battery. Normal charging voltage is 13.8V to 14.6V. If below 13.0V, alternator has failed. on the Chrysler Voyager equipped with 3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic).

Required Tool: Multimeter
04
Replace Battery or Alternator as Indicated

Install new high-CCA AGM or flooded battery, or replace alternator. on the Chrysler Voyager equipped with 3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic).

Required Tool: Socket Set, Wrenches
05
Clear Trouble Codes & Reset BMS

Clear DTCs and perform Battery Management System (BMS) reset if equipped. on the Chrysler Voyager equipped with 3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic).

Required Tool: OBD-II Scan Tool
Recommended Parts & Testing Tools

Equipment for Diagnosing Chrysler Voyager (B1318)

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Direct-Fit Replacement Part

Chrysler Voyager OEM Replacement Sensor

4.7 / 5.0 (Verified Fit)

Direct-fit replacement assembly engineered to OEM tolerances for Chrysler Voyager.

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Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

4.6 / 5.0 (Best Seller)

Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.

$29.99 Prime
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Top Mobile OBD-II Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

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Other Common Fault Codes on Chrysler Voyager

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Chrysler Voyager:

4. Chrysler Voyager B1318 FAQs

What causes code B1318 to trigger on a Chrysler Voyager?

On the Chrysler Voyager (3.6L Pentastar V6 24V VVT (287HP / 9-Speed Automatic)), B1318 is most frequently caused by Failing 12V automotive battery (sulfated plates or dead cell) or Faulty alternator not charging battery (>13.5V).

Where is the OBD-II port located on my Chrysler Voyager?

On the Chrysler Voyager, the 16-pin DLC diagnostic connector is located Driver lower kick panel near hood release lever. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Chrysler Voyager with code B1318?

Caution. Low voltage (<10V) causes random module dropouts, flickering dash lights, and stalling. Given that B1318 carries a Medium severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.