P208B RAM Code - Diesel Exhaust Fluid Reductant Pump Range/Performance
Quick Answer
The Diesel Exhaust Fluid (DEF) Supply Pump Assembly has many functions. Common causes include Faulty Diesel Exhaust Fluid (DEF) Supply Pump Assembly, DEF Supply Pump Assembly harness is open or shorted, DEF Supply Pump Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P208B RAM indicates Diesel Exhaust Fluid Reductant Pump Range/Performance.
- Common causes
- Common causes include Faulty Diesel Exhaust Fluid (DEF) Supply Pump Assembly, DEF Supply Pump Assembly harness is open or shorted, DEF Supply Pump Assembly circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P208B RAM Description
The first warning will occur when the p-code becomes pending or active. The customer will hear a chime and get an EVIC message reading "Service DEF System See Dealer." The second warning level will occur if the customer continues to drive, and the code has not cleared. The customer will hear a chime and get an EVIC message reading "Speed Limited to 5 mph in XXX MILES See Dealer". Upon driving until the countdown reaches zero, the customer will hear a chime and get an EVIC message reading "5 mph Max on Restart, Long Idle or Refuel See Dealer." Upon key-off, refuel, or 1 hour long idle, the EVIC message will read, "Speed Limited to 5 mph See Dealer." Once induced to a 5 mph derate, the inducement will not clear unless the diagnostic runs and passes, or the PCM is recalibrated.
What are the Possible Causes of the DTC P208B RAM?
- Faulty Diesel Exhaust Fluid (DEF) Supply Pump Assembly
- DEF Supply Pump Assembly harness is open or shorted
- DEF Supply Pump Assembly circuit poor electrical connection
- Faulty DEF Dosing Control Unit
How to Fix the DTC P208B RAM?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P208B RAM code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P208B RAM Code
What does the OBDII code P208B mean in a RAM vehicle?
P208B indicates a performance or range issue with the Diesel Exhaust Fluid (DEF) reductant pump, which is responsible for delivering DEF to the exhaust system for emissions control.
What are the common symptoms of P208B in a RAM truck?
Symptoms may include the check engine light, poor engine performance, reduced fuel efficiency, and warnings related to the DEF system or emissions control.
What causes the P208B code to trigger on a RAM vehicle?
Common causes include a faulty DEF reductant pump, clogged DEF lines, low-quality DEF fluid, electrical issues like damaged wiring or connectors, or a malfunctioning pressure sensor.
Can I drive my RAM truck with the P208B code active?
Driving with this code may lead to reduced engine performance and eventually trigger a "limp mode" condition. Prolonged driving without repair can worsen emissions problems or cause further damage.
How can I diagnose the P208B code in a RAM truck?
Diagnosis involves checking the DEF pump and lines for blockages, inspecting wiring and connectors for damage, testing the reductant pressure sensor, and ensuring the DEF fluid is clean and meets specifications.
How is the P208B code typically repaired in a RAM vehicle?
Repairs may include replacing the DEF reductant pump, cleaning or replacing DEF lines, repairing damaged wiring, replacing the pressure sensor, or draining and refilling the DEF tank with proper fluid.
Can low-quality DEF fluid cause the P208B code?
Yes, contaminated or low-quality DEF fluid can clog the system or disrupt the pump’s performance, leading to this code.
How much does it cost to repair the P208B code in a RAM truck?
Repair costs can vary widely, ranging from $200 for minor fixes like cleaning lines or replacing sensors to over $1,000 for a new DEF pump or extensive system repairs.
Is the P208B code covered under warranty for RAM trucks?
Depending on the age and mileage of the vehicle, emissions-related components like the DEF pump may be covered under the manufacturer’s emissions warranty.
What maintenance can help prevent the P208B code in a RAM truck?
Regularly using high-quality DEF fluid, inspecting the DEF system for leaks or damage, and ensuring timely servicing of the emissions system can help prevent this code.
Discuss the causes and fixes for P208B RAM OBDII Code
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